diff --git a/bin/dump_tmux_color.sh b/bin/dump_tmux_color.sh
new file mode 100755
index 0000000..e46bd53
--- /dev/null
+++ b/bin/dump_tmux_color.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+set -euo pipefail
+
+printf "\n  "
+for i in {0..255}; do
+	colcode="colour${i}"
+	printf "\x1b[38;5;${i}m%-10s " $colcode
+	if [ $((($i + 1) % 8)) = 0 ]; then
+		printf "\n  "
+	fi
+done
+printf "\n"