8-bit bash colors

256-colors.bash

#!/bin/bash

# https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit

color_code=()
color_text=()
for c in {0..255}; do
    color_code+=($(tput setaf $c))
    color_text+=($(printf '%s=%i' "$(tput setaf $c | cat -v)" $c))
done

for i in {0..7}; do
    printf '%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"   "${color_text[$i]}" \
    "${color_code[$i+8]}" "${color_text[$i+8]}"
done

echo

for i in {16..33}; do
    printf '%s%-16.16s\t%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"    "${color_text[$i]}" \
    "${color_code[$i+18]}" "${color_text[$i+18]}" \
    "${color_code[$i+36]}" "${color_text[$i+36]}"
done

echo

for i in {70..87}; do
    printf '%s%-16.16s\t%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"    "${color_text[$i]}" \
    "${color_code[$i+18]}" "${color_text[$i+18]}" \
    "${color_code[$i+36]}" "${color_text[$i+36]}"
done

echo

for i in {124..141}; do
    printf '%s%-16.16s\t%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"    "${color_text[$i]}" \
    "${color_code[$i+18]}" "${color_text[$i+18]}" \
    "${color_code[$i+36]}" "${color_text[$i+36]}"
done

echo

for i in {178..195}; do
    printf '%s%-16.16s\t%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"    "${color_text[$i]}" \
    "${color_code[$i+18]}" "${color_text[$i+18]}" \
    "${color_code[$i+36]}" "${color_text[$i+36]}"
done

echo

for i in {232..243}; do
    printf '%s%-16.16s\t%s%-16.16s\n' \
    "${color_code[$i]}"    "${color_text[$i]}" \
    "${color_code[$i+12]}" "${color_text[$i+12]}"
done

tput sgr0