Linux Bash terminal colors

colors.sh

#!/bin/bash

# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.

#Background
for clbg in {40..47} {100..107} 49 ; do
    #Foreground
    for clfg in {30..37} {90..97} 39 ; do
        #Formatting
        for attr in 0 1 2 4 5 7 ; do
            #Print the result
            echo -en "\e[${attr};${clbg};${clfg}m ^[${attr};${clbg};${clfg}m \e[0m"
        done
        echo #Newline
    done
done

exit 0