#!/bin/bash

IFS=, read -ra red </sys/module/vt/parameters/default_red
IFS=, read -ra grn </sys/module/vt/parameters/default_grn
IFS=, read -ra blu </sys/module/vt/parameters/default_blu

colors=(black red green yellow blue magenta cyan white)

for i in {0..15}; do

    { (( i >= ${#colors[@]} )) && name="bright ${colors[i-8]}" || name=${colors[i]}; }

    printf '%14s: #%02X%02X%02X\n' "$name" "${red[i]}" "${grn[i]}" "${blu[i]}"

done