diff --git a/home/fish.nix b/home/fish.nix
index 433c7dc..a5ade03 100644
--- a/home/fish.nix
+++ b/home/fish.nix
@@ -180,6 +180,7 @@
       top = "${pkgs.bottom}/bin/btm";
       htop = "${pkgs.bottom}/bin/btm";
       tb = "toggle-background";
+      colortest = "${pkgs.terminal-colors}/bin/terminal-colors -o";
     } // lib.optionalAttrs pkgs.stdenv.isDarwin {
       sb = "set-background-to-macOS";
       conda-init = "eval /opt/homebrew/bin/conda 'shell.fish' 'hook' $argv | source";
diff --git a/home/programs.nix b/home/programs.nix
index 309b2b3..7975b1b 100644
--- a/home/programs.nix
+++ b/home/programs.nix
@@ -73,6 +73,9 @@
       pv
       # command line file encryption
       rage
+      # terminal color support testing
+      terminal-colors
+      # automatic command line fixes
       thefuck
       # extract RAR archives
       unrar