Script to show all terminal colors

colors.sh

#!/bin/bash

DEFAULT_COLORS=256
COLORS="${1:-DEFAULT_COLORS}"
for ((n = 0; n < $COLORS; n++)); do
	if ((n < 10)); then s="   "; elif ((n < 100)); then s="  "; else s=" "; fi
	printf " %s[%d] $(tput setaf $n)%s$(tput sgr0)" "$s" $n "▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
"
done