#!/usr/bin/env bash

# set colors

colors=($(xrdb -query | sed -n 's/.*color\([0-9]\)/\1/p' | sort -nu | cut -f2))

f=3 b=4
for j in f b; do
    for i in {0..7}; do
        printf -v $j$i %b "\e[${!j}${i}m"
    done
done
t=$'\e[0m'


# output

cat << EOF

$f1▀▀▀▀▀▀▀$t  $f2▀▀▀▀▀▀▀$t  $f3▀▀▀▀▀▀▀$t  $f4▀▀▀▀▀▀▀$t  $f5▀▀▀▀▀▀▀$t  $f6▀▀▀▀▀▀▀$t  $f7▀▀▀▀▀▀▀$t
EOF
for i in {1..7}; do echo -en "\e[$((30+$i))m${colors[i]} \e[0m "; done
echo
echo