-- based on
-- https://colorbrewer2.org
-- https://github.com/axismaps/colorbrewer/blob/master/colorbrewer_schemes.js

local colorbrewer = {}

-- Diverging
colorbrewer['Spectral'] = {
  [3] = { { 252, 141, 89 }, { 255, 255, 191 }, { 153, 213, 148 } },
  [4] = { { 215, 25, 28 }, { 253, 174, 97 }, { 171, 221, 164 }, { 43, 131, 186 } },
  [5] = { { 215, 25, 28 }, { 253, 174, 97 }, { 255, 255, 191 }, { 171, 221, 164 }, { 43, 131, 186 } },
  [6] = { { 213, 62, 79 }, { 252, 141, 89 }, { 254, 224, 139 }, { 230, 245, 152 }, { 153, 213, 148 }, { 50, 136, 189 } },
  [7] = { { 213, 62, 79 }, { 252, 141, 89 }, { 254, 224, 139 }, { 255, 255, 191 }, { 230, 245, 152 }, { 153, 213, 148 },
    { 50, 136, 189 } },
  [8] = { { 213, 62, 79 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 230, 245, 152 }, { 171, 221, 164 },
    { 102, 194, 165 }, { 50, 136, 189 } },
  [9] = { { 213, 62, 79 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 255, 255, 191 }, { 230, 245, 152 },
    { 171, 221, 164 }, { 102, 194, 165 }, { 50, 136, 189 } },
  [10] = { { 158, 1, 66 }, { 213, 62, 79 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 230, 245, 152 },
    { 171, 221, 164 }, { 102, 194, 165 }, { 50, 136, 189 }, { 94, 79, 162 } },
  [11] = { { 158, 1, 66 }, { 213, 62, 79 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 255, 255, 191 },
    { 230, 245, 152 }, { 171, 221, 164 }, { 102, 194, 165 }, { 50, 136, 189 }, { 94, 79, 162 } }
}
colorbrewer['RdYlGn'] = {
  [3] = { { 252, 141, 89 }, { 255, 255, 191 }, { 145, 207, 96 } },
  [4] = { { 215, 25, 28 }, { 253, 174, 97 }, { 166, 217, 106 }, { 26, 150, 65 } },
  [5] = { { 215, 25, 28 }, { 253, 174, 97 }, { 255, 255, 191 }, { 166, 217, 106 }, { 26, 150, 65 } },
  [6] = { { 215, 48, 39 }, { 252, 141, 89 }, { 254, 224, 139 }, { 217, 239, 139 }, { 145, 207, 96 }, { 26, 152, 80 } },
  [7] = { { 215, 48, 39 }, { 252, 141, 89 }, { 254, 224, 139 }, { 255, 255, 191 }, { 217, 239, 139 }, { 145, 207, 96 },
    { 26, 152, 80 } },
  [8] = { { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 217, 239, 139 }, { 166, 217, 106 },
    { 102, 189, 99 }, { 26, 152, 80 } },
  [9] = { { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 255, 255, 191 }, { 217, 239, 139 },
    { 166, 217, 106 }, { 102, 189, 99 }, { 26, 152, 80 } },
  [10] = { { 165, 0, 38 }, { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 217, 239, 139 },
    { 166, 217, 106 }, { 102, 189, 99 }, { 26, 152, 80 }, { 0, 104, 55 } },
  [11] = { { 165, 0, 38 }, { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 139 }, { 255, 255, 191 },
    { 217, 239, 139 }, { 166, 217, 106 }, { 102, 189, 99 }, { 26, 152, 80 }, { 0, 104, 55 } }
}
colorbrewer['RdBu'] = {
  [3] = { { 239, 138, 98 }, { 247, 247, 247 }, { 103, 169, 207 } },
  [4] = { { 202, 0, 32 }, { 244, 165, 130 }, { 146, 197, 222 }, { 5, 113, 176 } },
  [5] = { { 202, 0, 32 }, { 244, 165, 130 }, { 247, 247, 247 }, { 146, 197, 222 }, { 5, 113, 176 } },
  [6] = { { 178, 24, 43 }, { 239, 138, 98 }, { 253, 219, 199 }, { 209, 229, 240 }, { 103, 169, 207 }, { 33, 102, 172 } },
  [7] = { { 178, 24, 43 }, { 239, 138, 98 }, { 253, 219, 199 }, { 247, 247, 247 }, { 209, 229, 240 }, { 103, 169, 207 },
    { 33, 102, 172 } },
  [8] = { { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 209, 229, 240 }, { 146, 197, 222 },
    { 67, 147, 195 }, { 33, 102, 172 } },
  [9] = { { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 247, 247, 247 }, { 209, 229, 240 },
    { 146, 197, 222 }, { 67, 147, 195 }, { 33, 102, 172 } },
  [10] = { { 103, 0, 31 }, { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 209, 229, 240 },
    { 146, 197, 222 }, { 67, 147, 195 }, { 33, 102, 172 }, { 5, 48, 97 } },
  [11] = { { 103, 0, 31 }, { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 247, 247, 247 },
    { 209, 229, 240 }, { 146, 197, 222 }, { 67, 147, 195 }, { 33, 102, 172 }, { 5, 48, 97 } }
}
colorbrewer['PiYG'] = {
  [3] = { { 233, 163, 201 }, { 247, 247, 247 }, { 161, 215, 106 } },
  [4] = { { 208, 28, 139 }, { 241, 182, 218 }, { 184, 225, 134 }, { 77, 172, 38 } },
  [5] = { { 208, 28, 139 }, { 241, 182, 218 }, { 247, 247, 247 }, { 184, 225, 134 }, { 77, 172, 38 } },
  [6] = { { 197, 27, 125 }, { 233, 163, 201 }, { 253, 224, 239 }, { 230, 245, 208 }, { 161, 215, 106 }, { 77, 146, 33 } },
  [7] = { { 197, 27, 125 }, { 233, 163, 201 }, { 253, 224, 239 }, { 247, 247, 247 }, { 230, 245, 208 }, { 161, 215, 106 },
    { 77, 146, 33 } },
  [8] = { { 197, 27, 125 }, { 222, 119, 174 }, { 241, 182, 218 }, { 253, 224, 239 }, { 230, 245, 208 }, { 184, 225, 134 },
    { 127, 188, 65 }, { 77, 146, 33 } },
  [9] = { { 197, 27, 125 }, { 222, 119, 174 }, { 241, 182, 218 }, { 253, 224, 239 }, { 247, 247, 247 }, { 230, 245, 208 },
    { 184, 225, 134 }, { 127, 188, 65 }, { 77, 146, 33 } },
  [10] = { { 142, 1, 82 }, { 197, 27, 125 }, { 222, 119, 174 }, { 241, 182, 218 }, { 253, 224, 239 }, { 230, 245, 208 },
    { 184, 225, 134 }, { 127, 188, 65 }, { 77, 146, 33 }, { 39, 100, 25 } },
  [11] = { { 142, 1, 82 }, { 197, 27, 125 }, { 222, 119, 174 }, { 241, 182, 218 }, { 253, 224, 239 }, { 247, 247, 247 },
    { 230, 245, 208 }, { 184, 225, 134 }, { 127, 188, 65 }, { 77, 146, 33 }, { 39, 100, 25 } }
}
colorbrewer['PRGn'] = {
  [3] = { { 175, 141, 195 }, { 247, 247, 247 }, { 127, 191, 123 } },
  [4] = { { 123, 50, 148 }, { 194, 165, 207 }, { 166, 219, 160 }, { 0, 136, 55 } },
  [5] = { { 123, 50, 148 }, { 194, 165, 207 }, { 247, 247, 247 }, { 166, 219, 160 }, { 0, 136, 55 } },
  [6] = { { 118, 42, 131 }, { 175, 141, 195 }, { 231, 212, 232 }, { 217, 240, 211 }, { 127, 191, 123 }, { 27, 120, 55 } },
  [7] = { { 118, 42, 131 }, { 175, 141, 195 }, { 231, 212, 232 }, { 247, 247, 247 }, { 217, 240, 211 }, { 127, 191, 123 },
    { 27, 120, 55 } },
  [8] = { { 118, 42, 131 }, { 153, 112, 171 }, { 194, 165, 207 }, { 231, 212, 232 }, { 217, 240, 211 }, { 166, 219, 160 },
    { 90, 174, 97 }, { 27, 120, 55 } },
  [9] = { { 118, 42, 131 }, { 153, 112, 171 }, { 194, 165, 207 }, { 231, 212, 232 }, { 247, 247, 247 }, { 217, 240, 211 },
    { 166, 219, 160 }, { 90, 174, 97 }, { 27, 120, 55 } },
  [10] = { { 64, 0, 75 }, { 118, 42, 131 }, { 153, 112, 171 }, { 194, 165, 207 }, { 231, 212, 232 }, { 217, 240, 211 },
    { 166, 219, 160 }, { 90, 174, 97 }, { 27, 120, 55 }, { 0, 68, 27 } },
  [11] = { { 64, 0, 75 }, { 118, 42, 131 }, { 153, 112, 171 }, { 194, 165, 207 }, { 231, 212, 232 }, { 247, 247, 247 },
    { 217, 240, 211 }, { 166, 219, 160 }, { 90, 174, 97 }, { 27, 120, 55 }, { 0, 68, 27 } }
}
colorbrewer['RdYlBu'] = {
  [3] = { { 252, 141, 89 }, { 255, 255, 191 }, { 145, 191, 219 } },
  [4] = { { 215, 25, 28 }, { 253, 174, 97 }, { 171, 217, 233 }, { 44, 123, 182 } },
  [5] = { { 215, 25, 28 }, { 253, 174, 97 }, { 255, 255, 191 }, { 171, 217, 233 }, { 44, 123, 182 } },
  [6] = { { 215, 48, 39 }, { 252, 141, 89 }, { 254, 224, 144 }, { 224, 243, 248 }, { 145, 191, 219 }, { 69, 117, 180 } },
  [7] = { { 215, 48, 39 }, { 252, 141, 89 }, { 254, 224, 144 }, { 255, 255, 191 }, { 224, 243, 248 }, { 145, 191, 219 },
    { 69, 117, 180 } },
  [8] = { { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 144 }, { 224, 243, 248 }, { 171, 217, 233 },
    { 116, 173, 209 }, { 69, 117, 180 } },
  [9] = { { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 144 }, { 255, 255, 191 }, { 224, 243, 248 },
    { 171, 217, 233 }, { 116, 173, 209 }, { 69, 117, 180 } },
  [10] = { { 165, 0, 38 }, { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 144 }, { 224, 243, 248 },
    { 171, 217, 233 }, { 116, 173, 209 }, { 69, 117, 180 }, { 49, 54, 149 } },
  [11] = { { 165, 0, 38 }, { 215, 48, 39 }, { 244, 109, 67 }, { 253, 174, 97 }, { 254, 224, 144 }, { 255, 255, 191 },
    { 224, 243, 248 }, { 171, 217, 233 }, { 116, 173, 209 }, { 69, 117, 180 }, { 49, 54, 149 } }
}
colorbrewer['BrBG'] = {
  [3] = { { 216, 179, 101 }, { 245, 245, 245 }, { 90, 180, 172 } },
  [4] = { { 166, 97, 26 }, { 223, 194, 125 }, { 128, 205, 193 }, { 1, 133, 113 } },
  [5] = { { 166, 97, 26 }, { 223, 194, 125 }, { 245, 245, 245 }, { 128, 205, 193 }, { 1, 133, 113 } },
  [6] = { { 140, 81, 10 }, { 216, 179, 101 }, { 246, 232, 195 }, { 199, 234, 229 }, { 90, 180, 172 }, { 1, 102, 94 } },
  [7] = { { 140, 81, 10 }, { 216, 179, 101 }, { 246, 232, 195 }, { 245, 245, 245 }, { 199, 234, 229 }, { 90, 180, 172 },
    { 1, 102, 94 } },
  [8] = { { 140, 81, 10 }, { 191, 129, 45 }, { 223, 194, 125 }, { 246, 232, 195 }, { 199, 234, 229 }, { 128, 205, 193 },
    { 53, 151, 143 }, { 1, 102, 94 } },
  [9] = { { 140, 81, 10 }, { 191, 129, 45 }, { 223, 194, 125 }, { 246, 232, 195 }, { 245, 245, 245 }, { 199, 234, 229 },
    { 128, 205, 193 }, { 53, 151, 143 }, { 1, 102, 94 } },
  [10] = { { 84, 48, 5 }, { 140, 81, 10 }, { 191, 129, 45 }, { 223, 194, 125 }, { 246, 232, 195 }, { 199, 234, 229 },
    { 128, 205, 193 }, { 53, 151, 143 }, { 1, 102, 94 }, { 0, 60, 48 } },
  [11] = { { 84, 48, 5 }, { 140, 81, 10 }, { 191, 129, 45 }, { 223, 194, 125 }, { 246, 232, 195 }, { 245, 245, 245 },
    { 199, 234, 229 }, { 128, 205, 193 }, { 53, 151, 143 }, { 1, 102, 94 }, { 0, 60, 48 } }
}
colorbrewer['RdGy'] = {
  [3] = { { 239, 138, 98 }, { 255, 255, 255 }, { 153, 153, 153 } },
  [4] = { { 202, 0, 32 }, { 244, 165, 130 }, { 186, 186, 186 }, { 64, 64, 64 } },
  [5] = { { 202, 0, 32 }, { 244, 165, 130 }, { 255, 255, 255 }, { 186, 186, 186 }, { 64, 64, 64 } },
  [6] = { { 178, 24, 43 }, { 239, 138, 98 }, { 253, 219, 199 }, { 224, 224, 224 }, { 153, 153, 153 }, { 77, 77, 77 } },
  [7] = { { 178, 24, 43 }, { 239, 138, 98 }, { 253, 219, 199 }, { 255, 255, 255 }, { 224, 224, 224 }, { 153, 153, 153 },
    { 77, 77, 77 } },
  [8] = { { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 224, 224, 224 }, { 186, 186, 186 },
    { 135, 135, 135 }, { 77, 77, 77 } },
  [9] = { { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 255, 255, 255 }, { 224, 224, 224 },
    { 186, 186, 186 }, { 135, 135, 135 }, { 77, 77, 77 } },
  [10] = { { 103, 0, 31 }, { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 224, 224, 224 },
    { 186, 186, 186 }, { 135, 135, 135 }, { 77, 77, 77 }, { 26, 26, 26 } },
  [11] = { { 103, 0, 31 }, { 178, 24, 43 }, { 214, 96, 77 }, { 244, 165, 130 }, { 253, 219, 199 }, { 255, 255, 255 },
    { 224, 224, 224 }, { 186, 186, 186 }, { 135, 135, 135 }, { 77, 77, 77 }, { 26, 26, 26 } }
}
colorbrewer['PuOr'] = {
  [3] = { { 241, 163, 64 }, { 247, 247, 247 }, { 153, 142, 195 } },
  [4] = { { 230, 97, 1 }, { 253, 184, 99 }, { 178, 171, 210 }, { 94, 60, 153 } },
  [5] = { { 230, 97, 1 }, { 253, 184, 99 }, { 247, 247, 247 }, { 178, 171, 210 }, { 94, 60, 153 } },
  [6] = { { 179, 88, 6 }, { 241, 163, 64 }, { 254, 224, 182 }, { 216, 218, 235 }, { 153, 142, 195 }, { 84, 39, 136 } },
  [7] = { { 179, 88, 6 }, { 241, 163, 64 }, { 254, 224, 182 }, { 247, 247, 247 }, { 216, 218, 235 }, { 153, 142, 195 },
    { 84, 39, 136 } },
  [8] = { { 179, 88, 6 }, { 224, 130, 20 }, { 253, 184, 99 }, { 254, 224, 182 }, { 216, 218, 235 }, { 178, 171, 210 },
    { 128, 115, 172 }, { 84, 39, 136 } },
  [9] = { { 179, 88, 6 }, { 224, 130, 20 }, { 253, 184, 99 }, { 254, 224, 182 }, { 247, 247, 247 }, { 216, 218, 235 },
    { 178, 171, 210 }, { 128, 115, 172 }, { 84, 39, 136 } },
  [10] = { { 127, 59, 8 }, { 179, 88, 6 }, { 224, 130, 20 }, { 253, 184, 99 }, { 254, 224, 182 }, { 216, 218, 235 },
    { 178, 171, 210 }, { 128, 115, 172 }, { 84, 39, 136 }, { 45, 0, 75 } },
  [11] = { { 127, 59, 8 }, { 179, 88, 6 }, { 224, 130, 20 }, { 253, 184, 99 }, { 254, 224, 182 }, { 247, 247, 247 },
    { 216, 218, 235 }, { 178, 171, 210 }, { 128, 115, 172 }, { 84, 39, 136 }, { 45, 0, 75 } }
}

-- Qualitative
colorbrewer['Set2'] = {
  [3] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 } },
  [4] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 }, { 231, 138, 195 } },
  [5] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 }, { 231, 138, 195 }, { 166, 216, 84 } },
  [6] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 }, { 231, 138, 195 }, { 166, 216, 84 }, { 255, 217, 47 } },
  [7] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 }, { 231, 138, 195 }, { 166, 216, 84 }, { 255, 217, 47 },
    { 229, 196, 148 } },
  [8] = { { 102, 194, 165 }, { 252, 141, 98 }, { 141, 160, 203 }, { 231, 138, 195 }, { 166, 216, 84 }, { 255, 217, 47 },
    { 229, 196, 148 }, { 179, 179, 179 } }
}
colorbrewer['Accent'] = {
  [3] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 } },
  [4] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 }, { 255, 255, 153 } },
  [5] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 }, { 255, 255, 153 }, { 56, 108, 176 } },
  [6] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 }, { 255, 255, 153 }, { 56, 108, 176 }, { 240, 2, 127 } },
  [7] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 }, { 255, 255, 153 }, { 56, 108, 176 }, { 240, 2, 127 },
    { 191, 91, 23 } },
  [8] = { { 127, 201, 127 }, { 190, 174, 212 }, { 253, 192, 134 }, { 255, 255, 153 }, { 56, 108, 176 }, { 240, 2, 127 },
    { 191, 91, 23 }, { 102, 102, 102 } }
}
colorbrewer['Set1'] = {
  [3] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 } },
  [4] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 } },
  [5] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 }, { 255, 127, 0 } },
  [6] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 }, { 255, 127, 0 }, { 255, 255, 51 } },
  [7] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 }, { 255, 127, 0 }, { 255, 255, 51 },
    { 166, 86, 40 } },
  [8] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 }, { 255, 127, 0 }, { 255, 255, 51 },
    { 166, 86, 40 }, { 247, 129, 191 } },
  [9] = { { 228, 26, 28 }, { 55, 126, 184 }, { 77, 175, 74 }, { 152, 78, 163 }, { 255, 127, 0 }, { 255, 255, 51 },
    { 166, 86, 40 }, { 247, 129, 191 }, { 153, 153, 153 } }
}
colorbrewer['Set3'] = {
  [3] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 } },
  [4] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 } },
  [5] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 } },
  [6] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 }, { 253, 180, 98 } },
  [7] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 }, { 253, 180, 98 },
    { 179, 222, 105 } },
  [8] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 }, { 253, 180, 98 },
    { 179, 222, 105 }, { 252, 205, 229 } },
  [9] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 }, { 253, 180, 98 },
    { 179, 222, 105 }, { 252, 205, 229 }, { 217, 217, 217 } },
  [10] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 },
    { 253, 180, 98 }, { 179, 222, 105 }, { 252, 205, 229 }, { 217, 217, 217 }, { 188, 128, 189 } },
  [11] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 },
    { 253, 180, 98 }, { 179, 222, 105 }, { 252, 205, 229 }, { 217, 217, 217 }, { 188, 128, 189 }, { 204, 235, 197 } },
  [12] = { { 141, 211, 199 }, { 255, 255, 179 }, { 190, 186, 218 }, { 251, 128, 114 }, { 128, 177, 211 },
    { 253, 180, 98 }, { 179, 222, 105 }, { 252, 205, 229 }, { 217, 217, 217 }, { 188, 128, 189 }, { 204, 235, 197 },
    { 255, 237, 111 } }
}
colorbrewer['Dark2'] = {
  [3] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 } },
  [4] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 }, { 231, 41, 138 } },
  [5] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 }, { 231, 41, 138 }, { 102, 166, 30 } },
  [6] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 }, { 231, 41, 138 }, { 102, 166, 30 }, { 230, 171, 2 } },
  [7] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 }, { 231, 41, 138 }, { 102, 166, 30 }, { 230, 171, 2 },
    { 166, 118, 29 } },
  [8] = { { 27, 158, 119 }, { 217, 95, 2 }, { 117, 112, 179 }, { 231, 41, 138 }, { 102, 166, 30 }, { 230, 171, 2 },
    { 166, 118, 29 }, { 102, 102, 102 } }
}
colorbrewer['Paired'] = {
  [3] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 } },
  [4] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 } },
  [5] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 } },
  [6] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 } },
  [7] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 } },
  [8] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 }, { 255, 127, 0 } },
  [9] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 }, { 255, 127, 0 }, { 202, 178, 214 } },
  [10] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 }, { 255, 127, 0 }, { 202, 178, 214 }, { 106, 61, 154 } },
  [11] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 }, { 255, 127, 0 }, { 202, 178, 214 }, { 106, 61, 154 }, { 255, 255, 153 } },
  [12] = { { 166, 206, 227 }, { 31, 120, 180 }, { 178, 223, 138 }, { 51, 160, 44 }, { 251, 154, 153 }, { 227, 26, 28 },
    { 253, 191, 111 }, { 255, 127, 0 }, { 202, 178, 214 }, { 106, 61, 154 }, { 255, 255, 153 }, { 177, 89, 40 } }
}
colorbrewer['Pastel2'] = {
  [3] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 } },
  [4] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 }, { 244, 202, 228 } },
  [5] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 }, { 244, 202, 228 }, { 230, 245, 201 } },
  [6] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 }, { 244, 202, 228 }, { 230, 245, 201 },
    { 255, 242, 174 } },
  [7] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 }, { 244, 202, 228 }, { 230, 245, 201 },
    { 255, 242, 174 }, { 241, 226, 204 } },
  [8] = { { 179, 226, 205 }, { 253, 205, 172 }, { 203, 213, 232 }, { 244, 202, 228 }, { 230, 245, 201 },
    { 255, 242, 174 }, { 241, 226, 204 }, { 204, 204, 204 } }
}
colorbrewer['Pastel1'] = {
  [3] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 } },
  [4] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 } },
  [5] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 }, { 254, 217, 166 } },
  [6] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 }, { 254, 217, 166 },
    { 255, 255, 204 } },
  [7] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 }, { 254, 217, 166 },
    { 255, 255, 204 }, { 229, 216, 189 } },
  [8] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 }, { 254, 217, 166 },
    { 255, 255, 204 }, { 229, 216, 189 }, { 253, 218, 236 } },
  [9] = { { 251, 180, 174 }, { 179, 205, 227 }, { 204, 235, 197 }, { 222, 203, 228 }, { 254, 217, 166 },
    { 255, 255, 204 }, { 229, 216, 189 }, { 253, 218, 236 }, { 242, 242, 242 } }
}

-- Sequential
colorbrewer['OrRd'] = {
  [3] = { { 254, 232, 200 }, { 253, 187, 132 }, { 227, 74, 51 } },
  [4] = { { 254, 240, 217 }, { 253, 204, 138 }, { 252, 141, 89 }, { 215, 48, 31 } },
  [5] = { { 254, 240, 217 }, { 253, 204, 138 }, { 252, 141, 89 }, { 227, 74, 51 }, { 179, 0, 0 } },
  [6] = { { 254, 240, 217 }, { 253, 212, 158 }, { 253, 187, 132 }, { 252, 141, 89 }, { 227, 74, 51 }, { 179, 0, 0 } },
  [7] = { { 254, 240, 217 }, { 253, 212, 158 }, { 253, 187, 132 }, { 252, 141, 89 }, { 239, 101, 72 }, { 215, 48, 31 },
    { 153, 0, 0 } },
  [8] = { { 255, 247, 236 }, { 254, 232, 200 }, { 253, 212, 158 }, { 253, 187, 132 }, { 252, 141, 89 }, { 239, 101, 72 },
    { 215, 48, 31 }, { 153, 0, 0 } },
  [9] = { { 255, 247, 236 }, { 254, 232, 200 }, { 253, 212, 158 }, { 253, 187, 132 }, { 252, 141, 89 }, { 239, 101, 72 },
    { 215, 48, 31 }, { 179, 0, 0 }, { 127, 0, 0 } }
}
colorbrewer['PuBu'] = {
  [3] = { { 236, 231, 242 }, { 166, 189, 219 }, { 43, 140, 190 } },
  [4] = { { 241, 238, 246 }, { 189, 201, 225 }, { 116, 169, 207 }, { 5, 112, 176 } },
  [5] = { { 241, 238, 246 }, { 189, 201, 225 }, { 116, 169, 207 }, { 43, 140, 190 }, { 4, 90, 141 } },
  [6] = { { 241, 238, 246 }, { 208, 209, 230 }, { 166, 189, 219 }, { 116, 169, 207 }, { 43, 140, 190 }, { 4, 90, 141 } },
  [7] = { { 241, 238, 246 }, { 208, 209, 230 }, { 166, 189, 219 }, { 116, 169, 207 }, { 54, 144, 192 }, { 5, 112, 176 },
    { 3, 78, 123 } },
  [8] = { { 255, 247, 251 }, { 236, 231, 242 }, { 208, 209, 230 }, { 166, 189, 219 }, { 116, 169, 207 }, { 54, 144, 192 },
    { 5, 112, 176 }, { 3, 78, 123 } },
  [9] = { { 255, 247, 251 }, { 236, 231, 242 }, { 208, 209, 230 }, { 166, 189, 219 }, { 116, 169, 207 }, { 54, 144, 192 },
    { 5, 112, 176 }, { 4, 90, 141 }, { 2, 56, 88 } }
}
colorbrewer['BuPu'] = {
  [3] = { { 224, 236, 244 }, { 158, 188, 218 }, { 136, 86, 167 } },
  [4] = { { 237, 248, 251 }, { 179, 205, 227 }, { 140, 150, 198 }, { 136, 65, 157 } },
  [5] = { { 237, 248, 251 }, { 179, 205, 227 }, { 140, 150, 198 }, { 136, 86, 167 }, { 129, 15, 124 } },
  [6] = { { 237, 248, 251 }, { 191, 211, 230 }, { 158, 188, 218 }, { 140, 150, 198 }, { 136, 86, 167 }, { 129, 15, 124 } },
  [7] = { { 237, 248, 251 }, { 191, 211, 230 }, { 158, 188, 218 }, { 140, 150, 198 }, { 140, 107, 177 }, { 136, 65, 157 },
    { 110, 1, 107 } },
  [8] = { { 247, 252, 253 }, { 224, 236, 244 }, { 191, 211, 230 }, { 158, 188, 218 }, { 140, 150, 198 },
    { 140, 107, 177 }, { 136, 65, 157 }, { 110, 1, 107 } },
  [9] = { { 247, 252, 253 }, { 224, 236, 244 }, { 191, 211, 230 }, { 158, 188, 218 }, { 140, 150, 198 },
    { 140, 107, 177 }, { 136, 65, 157 }, { 129, 15, 124 }, { 77, 0, 75 } }
}
colorbrewer['Oranges'] = {
  [3] = { { 254, 230, 206 }, { 253, 174, 107 }, { 230, 85, 13 } },
  [4] = { { 254, 237, 222 }, { 253, 190, 133 }, { 253, 141, 60 }, { 217, 71, 1 } },
  [5] = { { 254, 237, 222 }, { 253, 190, 133 }, { 253, 141, 60 }, { 230, 85, 13 }, { 166, 54, 3 } },
  [6] = { { 254, 237, 222 }, { 253, 208, 162 }, { 253, 174, 107 }, { 253, 141, 60 }, { 230, 85, 13 }, { 166, 54, 3 } },
  [7] = { { 254, 237, 222 }, { 253, 208, 162 }, { 253, 174, 107 }, { 253, 141, 60 }, { 241, 105, 19 }, { 217, 72, 1 },
    { 140, 45, 4 } },
  [8] = { { 255, 245, 235 }, { 254, 230, 206 }, { 253, 208, 162 }, { 253, 174, 107 }, { 253, 141, 60 }, { 241, 105, 19 },
    { 217, 72, 1 }, { 140, 45, 4 } },
  [9] = { { 255, 245, 235 }, { 254, 230, 206 }, { 253, 208, 162 }, { 253, 174, 107 }, { 253, 141, 60 }, { 241, 105, 19 },
    { 217, 72, 1 }, { 166, 54, 3 }, { 127, 39, 4 } }
}
colorbrewer['BuGn'] = {
  [3] = { { 229, 245, 249 }, { 153, 216, 201 }, { 44, 162, 95 } },
  [4] = { { 237, 248, 251 }, { 178, 226, 226 }, { 102, 194, 164 }, { 35, 139, 69 } },
  [5] = { { 237, 248, 251 }, { 178, 226, 226 }, { 102, 194, 164 }, { 44, 162, 95 }, { 0, 109, 44 } },
  [6] = { { 237, 248, 251 }, { 204, 236, 230 }, { 153, 216, 201 }, { 102, 194, 164 }, { 44, 162, 95 }, { 0, 109, 44 } },
  [7] = { { 237, 248, 251 }, { 204, 236, 230 }, { 153, 216, 201 }, { 102, 194, 164 }, { 65, 174, 118 }, { 35, 139, 69 },
    { 0, 88, 36 } },
  [8] = { { 247, 252, 253 }, { 229, 245, 249 }, { 204, 236, 230 }, { 153, 216, 201 }, { 102, 194, 164 }, { 65, 174, 118 },
    { 35, 139, 69 }, { 0, 88, 36 } },
  [9] = { { 247, 252, 253 }, { 229, 245, 249 }, { 204, 236, 230 }, { 153, 216, 201 }, { 102, 194, 164 }, { 65, 174, 118 },
    { 35, 139, 69 }, { 0, 109, 44 }, { 0, 68, 27 } }
}
colorbrewer['YlOrBr'] = {
  [3] = { { 255, 247, 188 }, { 254, 196, 79 }, { 217, 95, 14 } },
  [4] = { { 255, 255, 212 }, { 254, 217, 142 }, { 254, 153, 41 }, { 204, 76, 2 } },
  [5] = { { 255, 255, 212 }, { 254, 217, 142 }, { 254, 153, 41 }, { 217, 95, 14 }, { 153, 52, 4 } },
  [6] = { { 255, 255, 212 }, { 254, 227, 145 }, { 254, 196, 79 }, { 254, 153, 41 }, { 217, 95, 14 }, { 153, 52, 4 } },
  [7] = { { 255, 255, 212 }, { 254, 227, 145 }, { 254, 196, 79 }, { 254, 153, 41 }, { 236, 112, 20 }, { 204, 76, 2 },
    { 140, 45, 4 } },
  [8] = { { 255, 255, 229 }, { 255, 247, 188 }, { 254, 227, 145 }, { 254, 196, 79 }, { 254, 153, 41 }, { 236, 112, 20 },
    { 204, 76, 2 }, { 140, 45, 4 } },
  [9] = { { 255, 255, 229 }, { 255, 247, 188 }, { 254, 227, 145 }, { 254, 196, 79 }, { 254, 153, 41 }, { 236, 112, 20 },
    { 204, 76, 2 }, { 153, 52, 4 }, { 102, 37, 6 } }
}
colorbrewer['YlGn'] = {
  [3] = { { 247, 252, 185 }, { 173, 221, 142 }, { 49, 163, 84 } },
  [4] = { { 255, 255, 204 }, { 194, 230, 153 }, { 120, 198, 121 }, { 35, 132, 67 } },
  [5] = { { 255, 255, 204 }, { 194, 230, 153 }, { 120, 198, 121 }, { 49, 163, 84 }, { 0, 104, 55 } },
  [6] = { { 255, 255, 204 }, { 217, 240, 163 }, { 173, 221, 142 }, { 120, 198, 121 }, { 49, 163, 84 }, { 0, 104, 55 } },
  [7] = { { 255, 255, 204 }, { 217, 240, 163 }, { 173, 221, 142 }, { 120, 198, 121 }, { 65, 171, 93 }, { 35, 132, 67 },
    { 0, 90, 50 } },
  [8] = { { 255, 255, 229 }, { 247, 252, 185 }, { 217, 240, 163 }, { 173, 221, 142 }, { 120, 198, 121 }, { 65, 171, 93 },
    { 35, 132, 67 }, { 0, 90, 50 } },
  [9] = { { 255, 255, 229 }, { 247, 252, 185 }, { 217, 240, 163 }, { 173, 221, 142 }, { 120, 198, 121 }, { 65, 171, 93 },
    { 35, 132, 67 }, { 0, 104, 55 }, { 0, 69, 41 } }
}
colorbrewer['Reds'] = {
  [3] = { { 254, 224, 210 }, { 252, 146, 114 }, { 222, 45, 38 } },
  [4] = { { 254, 229, 217 }, { 252, 174, 145 }, { 251, 106, 74 }, { 203, 24, 29 } },
  [5] = { { 254, 229, 217 }, { 252, 174, 145 }, { 251, 106, 74 }, { 222, 45, 38 }, { 165, 15, 21 } },
  [6] = { { 254, 229, 217 }, { 252, 187, 161 }, { 252, 146, 114 }, { 251, 106, 74 }, { 222, 45, 38 }, { 165, 15, 21 } },
  [7] = { { 254, 229, 217 }, { 252, 187, 161 }, { 252, 146, 114 }, { 251, 106, 74 }, { 239, 59, 44 }, { 203, 24, 29 },
    { 153, 0, 13 } },
  [8] = { { 255, 245, 240 }, { 254, 224, 210 }, { 252, 187, 161 }, { 252, 146, 114 }, { 251, 106, 74 }, { 239, 59, 44 },
    { 203, 24, 29 }, { 153, 0, 13 } },
  [9] = { { 255, 245, 240 }, { 254, 224, 210 }, { 252, 187, 161 }, { 252, 146, 114 }, { 251, 106, 74 }, { 239, 59, 44 },
    { 203, 24, 29 }, { 165, 15, 21 }, { 103, 0, 13 } }
}
colorbrewer['RdPu'] = {
  [3] = { { 253, 224, 221 }, { 250, 159, 181 }, { 197, 27, 138 } },
  [4] = { { 254, 235, 226 }, { 251, 180, 185 }, { 247, 104, 161 }, { 174, 1, 126 } },
  [5] = { { 254, 235, 226 }, { 251, 180, 185 }, { 247, 104, 161 }, { 197, 27, 138 }, { 122, 1, 119 } },
  [6] = { { 254, 235, 226 }, { 252, 197, 192 }, { 250, 159, 181 }, { 247, 104, 161 }, { 197, 27, 138 }, { 122, 1, 119 } },
  [7] = { { 254, 235, 226 }, { 252, 197, 192 }, { 250, 159, 181 }, { 247, 104, 161 }, { 221, 52, 151 }, { 174, 1, 126 },
    { 122, 1, 119 } },
  [8] = { { 255, 247, 243 }, { 253, 224, 221 }, { 252, 197, 192 }, { 250, 159, 181 }, { 247, 104, 161 }, { 221, 52, 151 },
    { 174, 1, 126 }, { 122, 1, 119 } },
  [9] = { { 255, 247, 243 }, { 253, 224, 221 }, { 252, 197, 192 }, { 250, 159, 181 }, { 247, 104, 161 }, { 221, 52, 151 },
    { 174, 1, 126 }, { 122, 1, 119 }, { 73, 0, 106 } }
}
colorbrewer['Greens'] = {
  [3] = { { 229, 245, 224 }, { 161, 217, 155 }, { 49, 163, 84 } },
  [4] = { { 237, 248, 233 }, { 186, 228, 179 }, { 116, 196, 118 }, { 35, 139, 69 } },
  [5] = { { 237, 248, 233 }, { 186, 228, 179 }, { 116, 196, 118 }, { 49, 163, 84 }, { 0, 109, 44 } },
  [6] = { { 237, 248, 233 }, { 199, 233, 192 }, { 161, 217, 155 }, { 116, 196, 118 }, { 49, 163, 84 }, { 0, 109, 44 } },
  [7] = { { 237, 248, 233 }, { 199, 233, 192 }, { 161, 217, 155 }, { 116, 196, 118 }, { 65, 171, 93 }, { 35, 139, 69 },
    { 0, 90, 50 } },
  [8] = { { 247, 252, 245 }, { 229, 245, 224 }, { 199, 233, 192 }, { 161, 217, 155 }, { 116, 196, 118 }, { 65, 171, 93 },
    { 35, 139, 69 }, { 0, 90, 50 } },
  [9] = { { 247, 252, 245 }, { 229, 245, 224 }, { 199, 233, 192 }, { 161, 217, 155 }, { 116, 196, 118 }, { 65, 171, 93 },
    { 35, 139, 69 }, { 0, 109, 44 }, { 0, 68, 27 } }
}
colorbrewer['YlGnBu'] = {
  [3] = { { 237, 248, 177 }, { 127, 205, 187 }, { 44, 127, 184 } },
  [4] = { { 255, 255, 204 }, { 161, 218, 180 }, { 65, 182, 196 }, { 34, 94, 168 } },
  [5] = { { 255, 255, 204 }, { 161, 218, 180 }, { 65, 182, 196 }, { 44, 127, 184 }, { 37, 52, 148 } },
  [6] = { { 255, 255, 204 }, { 199, 233, 180 }, { 127, 205, 187 }, { 65, 182, 196 }, { 44, 127, 184 }, { 37, 52, 148 } },
  [7] = { { 255, 255, 204 }, { 199, 233, 180 }, { 127, 205, 187 }, { 65, 182, 196 }, { 29, 145, 192 }, { 34, 94, 168 },
    { 12, 44, 132 } },
  [8] = { { 255, 255, 217 }, { 237, 248, 177 }, { 199, 233, 180 }, { 127, 205, 187 }, { 65, 182, 196 }, { 29, 145, 192 },
    { 34, 94, 168 }, { 12, 44, 132 } },
  [9] = { { 255, 255, 217 }, { 237, 248, 177 }, { 199, 233, 180 }, { 127, 205, 187 }, { 65, 182, 196 }, { 29, 145, 192 },
    { 34, 94, 168 }, { 37, 52, 148 }, { 8, 29, 88 } }
}
colorbrewer['Purples'] = {
  [3] = { { 239, 237, 245 }, { 188, 189, 220 }, { 117, 107, 177 } },
  [4] = { { 242, 240, 247 }, { 203, 201, 226 }, { 158, 154, 200 }, { 106, 81, 163 } },
  [5] = { { 242, 240, 247 }, { 203, 201, 226 }, { 158, 154, 200 }, { 117, 107, 177 }, { 84, 39, 143 } },
  [6] = { { 242, 240, 247 }, { 218, 218, 235 }, { 188, 189, 220 }, { 158, 154, 200 }, { 117, 107, 177 }, { 84, 39, 143 } },
  [7] = { { 242, 240, 247 }, { 218, 218, 235 }, { 188, 189, 220 }, { 158, 154, 200 }, { 128, 125, 186 }, { 106, 81, 163 },
    { 74, 20, 134 } },
  [8] = { { 252, 251, 253 }, { 239, 237, 245 }, { 218, 218, 235 }, { 188, 189, 220 }, { 158, 154, 200 },
    { 128, 125, 186 }, { 106, 81, 163 }, { 74, 20, 134 } },
  [9] = { { 252, 251, 253 }, { 239, 237, 245 }, { 218, 218, 235 }, { 188, 189, 220 }, { 158, 154, 200 },
    { 128, 125, 186 }, { 106, 81, 163 }, { 84, 39, 143 }, { 63, 0, 125 } }
}
colorbrewer['GnBu'] = {
  [3] = { { 224, 243, 219 }, { 168, 221, 181 }, { 67, 162, 202 } },
  [4] = { { 240, 249, 232 }, { 186, 228, 188 }, { 123, 204, 196 }, { 43, 140, 190 } },
  [5] = { { 240, 249, 232 }, { 186, 228, 188 }, { 123, 204, 196 }, { 67, 162, 202 }, { 8, 104, 172 } },
  [6] = { { 240, 249, 232 }, { 204, 235, 197 }, { 168, 221, 181 }, { 123, 204, 196 }, { 67, 162, 202 }, { 8, 104, 172 } },
  [7] = { { 240, 249, 232 }, { 204, 235, 197 }, { 168, 221, 181 }, { 123, 204, 196 }, { 78, 179, 211 }, { 43, 140, 190 },
    { 8, 88, 158 } },
  [8] = { { 247, 252, 240 }, { 224, 243, 219 }, { 204, 235, 197 }, { 168, 221, 181 }, { 123, 204, 196 }, { 78, 179, 211 },
    { 43, 140, 190 }, { 8, 88, 158 } },
  [9] = { { 247, 252, 240 }, { 224, 243, 219 }, { 204, 235, 197 }, { 168, 221, 181 }, { 123, 204, 196 }, { 78, 179, 211 },
    { 43, 140, 190 }, { 8, 104, 172 }, { 8, 64, 129 } }
}
colorbrewer['Greys'] = {
  [3] = { { 240, 240, 240 }, { 189, 189, 189 }, { 99, 99, 99 } },
  [4] = { { 247, 247, 247 }, { 204, 204, 204 }, { 150, 150, 150 }, { 82, 82, 82 } },
  [5] = { { 247, 247, 247 }, { 204, 204, 204 }, { 150, 150, 150 }, { 99, 99, 99 }, { 37, 37, 37 } },
  [6] = { { 247, 247, 247 }, { 217, 217, 217 }, { 189, 189, 189 }, { 150, 150, 150 }, { 99, 99, 99 }, { 37, 37, 37 } },
  [7] = { { 247, 247, 247 }, { 217, 217, 217 }, { 189, 189, 189 }, { 150, 150, 150 }, { 115, 115, 115 }, { 82, 82, 82 },
    { 37, 37, 37 } },
  [8] = { { 255, 255, 255 }, { 240, 240, 240 }, { 217, 217, 217 }, { 189, 189, 189 }, { 150, 150, 150 },
    { 115, 115, 115 }, { 82, 82, 82 }, { 37, 37, 37 } },
  [9] = { { 255, 255, 255 }, { 240, 240, 240 }, { 217, 217, 217 }, { 189, 189, 189 }, { 150, 150, 150 },
    { 115, 115, 115 }, { 82, 82, 82 }, { 37, 37, 37 }, { 0, 0, 0 } }
}
colorbrewer['YlOrRd'] = {
  [3] = { { 255, 237, 160 }, { 254, 178, 76 }, { 240, 59, 32 } },
  [4] = { { 255, 255, 178 }, { 254, 204, 92 }, { 253, 141, 60 }, { 227, 26, 28 } },
  [5] = { { 255, 255, 178 }, { 254, 204, 92 }, { 253, 141, 60 }, { 240, 59, 32 }, { 189, 0, 38 } },
  [6] = { { 255, 255, 178 }, { 254, 217, 118 }, { 254, 178, 76 }, { 253, 141, 60 }, { 240, 59, 32 }, { 189, 0, 38 } },
  [7] = { { 255, 255, 178 }, { 254, 217, 118 }, { 254, 178, 76 }, { 253, 141, 60 }, { 252, 78, 42 }, { 227, 26, 28 },
    { 177, 0, 38 } },
  [8] = { { 255, 255, 204 }, { 255, 237, 160 }, { 254, 217, 118 }, { 254, 178, 76 }, { 253, 141, 60 }, { 252, 78, 42 },
    { 227, 26, 28 }, { 177, 0, 38 } },
  [9] = { { 255, 255, 204 }, { 255, 237, 160 }, { 254, 217, 118 }, { 254, 178, 76 }, { 253, 141, 60 }, { 252, 78, 42 },
    { 227, 26, 28 }, { 189, 0, 38 }, { 128, 0, 38 } }
}
colorbrewer['PuRd'] = {
  [3] = { { 231, 225, 239 }, { 201, 148, 199 }, { 221, 28, 119 } },
  [4] = { { 241, 238, 246 }, { 215, 181, 216 }, { 223, 101, 176 }, { 206, 18, 86 } },
  [5] = { { 241, 238, 246 }, { 215, 181, 216 }, { 223, 101, 176 }, { 221, 28, 119 }, { 152, 0, 67 } },
  [6] = { { 241, 238, 246 }, { 212, 185, 218 }, { 201, 148, 199 }, { 223, 101, 176 }, { 221, 28, 119 }, { 152, 0, 67 } },
  [7] = { { 241, 238, 246 }, { 212, 185, 218 }, { 201, 148, 199 }, { 223, 101, 176 }, { 231, 41, 138 }, { 206, 18, 86 },
    { 145, 0, 63 } },
  [8] = { { 247, 244, 249 }, { 231, 225, 239 }, { 212, 185, 218 }, { 201, 148, 199 }, { 223, 101, 176 }, { 231, 41, 138 },
    { 206, 18, 86 }, { 145, 0, 63 } },
  [9] = { { 247, 244, 249 }, { 231, 225, 239 }, { 212, 185, 218 }, { 201, 148, 199 }, { 223, 101, 176 }, { 231, 41, 138 },
    { 206, 18, 86 }, { 152, 0, 67 }, { 103, 0, 31 } }
}
colorbrewer['Blues'] = {
  [3] = { { 222, 235, 247 }, { 158, 202, 225 }, { 49, 130, 189 } },
  [4] = { { 239, 243, 255 }, { 189, 215, 231 }, { 107, 174, 214 }, { 33, 113, 181 } },
  [5] = { { 239, 243, 255 }, { 189, 215, 231 }, { 107, 174, 214 }, { 49, 130, 189 }, { 8, 81, 156 } },
  [6] = { { 239, 243, 255 }, { 198, 219, 239 }, { 158, 202, 225 }, { 107, 174, 214 }, { 49, 130, 189 }, { 8, 81, 156 } },
  [7] = { { 239, 243, 255 }, { 198, 219, 239 }, { 158, 202, 225 }, { 107, 174, 214 }, { 66, 146, 198 }, { 33, 113, 181 },
    { 8, 69, 148 } },
  [8] = { { 247, 251, 255 }, { 222, 235, 247 }, { 198, 219, 239 }, { 158, 202, 225 }, { 107, 174, 214 }, { 66, 146, 198 },
    { 33, 113, 181 }, { 8, 69, 148 } },
  [9] = { { 247, 251, 255 }, { 222, 235, 247 }, { 198, 219, 239 }, { 158, 202, 225 }, { 107, 174, 214 }, { 66, 146, 198 },
    { 33, 113, 181 }, { 8, 81, 156 }, { 8, 48, 107 } }
}
colorbrewer['PuBuGn'] = {
  [3] = { { 236, 226, 240 }, { 166, 189, 219 }, { 28, 144, 153 } },
  [4] = { { 246, 239, 247 }, { 189, 201, 225 }, { 103, 169, 207 }, { 2, 129, 138 } },
  [5] = { { 246, 239, 247 }, { 189, 201, 225 }, { 103, 169, 207 }, { 28, 144, 153 }, { 1, 108, 89 } },
  [6] = { { 246, 239, 247 }, { 208, 209, 230 }, { 166, 189, 219 }, { 103, 169, 207 }, { 28, 144, 153 }, { 1, 108, 89 } },
  [7] = { { 246, 239, 247 }, { 208, 209, 230 }, { 166, 189, 219 }, { 103, 169, 207 }, { 54, 144, 192 }, { 2, 129, 138 },
    { 1, 100, 80 } },
  [8] = { { 255, 247, 251 }, { 236, 226, 240 }, { 208, 209, 230 }, { 166, 189, 219 }, { 103, 169, 207 }, { 54, 144, 192 },
    { 2, 129, 138 }, { 1, 100, 80 } },
  [9] = { { 255, 247, 251 }, { 236, 226, 240 }, { 208, 209, 230 }, { 166, 189, 219 }, { 103, 169, 207 }, { 54, 144, 192 },
    { 2, 129, 138 }, { 1, 108, 89 }, { 1, 70, 54 } }
}

local names = {}
for name, _ in pairs(colorbrewer) do
  table.insert(names, name)
end

local function toColor(rgb)
  for i, val in ipairs(rgb) do
    rgb[i] = val / 255
  end
  rgb[4] = 1
  return rgb
end

for _, scheme in pairs(colorbrewer) do
  local highestVariant
  for _, variant in pairs(scheme) do
    -- save the highest variant for use in generating longer variants
    highestVariant = variant
    -- convert raw colors to love2d friendly values
    for i, rgb in pairs(variant) do
      variant[i] = toColor(rgb)
    end
  end
  -- patch in a 2-color variant for each scheme
  local first, last = scheme[3][1], scheme[3][3]
  scheme[0] = {}
  scheme[1] = { first }
  scheme[2] = { first, last }
  scheme.mt = {}
  setmetatable(scheme, scheme.mt)
  scheme.mt.__index = function(table, key)
    if type(key) ~= "number" then
      error("invalid key")
    end
    table[key] = {}
    for i = 1, #highestVariant do
      table[key][i] = highestVariant[i]
    end
    for i = #highestVariant + 1, key do
      table[key][i] = highestVariant[i % #highestVariant]
    end
    return table[key]
  end
end

function colorbrewer.random(length)
  local index = math.floor(math.random() * #names) + 1
  local name = names[index]
  local scheme = colorbrewer[name]
  return scheme[length]
end

-- set a specific random seed to avoid picking the same palette every time
math.randomseed(os.time())
return colorbrewer