Output ascii colors

colors.sh

#!/bin/bash
#
# Modified from here:
# http://misc.flogisoft.com/bash/tip_colors_and_formatting
#

color16()
{
#Foreground
for clfg in {30..37} {90..97} 39 ; do
  attr=0;       #Print the result
  clbg=49;
  echo -en "\e[${attr};${clbg};${clfg}m $(printf '%4s' $clfg) \e[0m"
done
echo
#Foreground
for clbg in {40..47} {100..107} 49; do
  attr=0;       #Print the result
  clfg=40;
  echo -en "\e[${clbg}m $(printf '%4s' $clbg) \e[0m"
done
echo

}

color256()
{

  for fgbg in 38 48 ; do #Foreground/Background
       for color in {0..256} ; do #Colors
            #Display the color
            echo -en "\e[${fgbg};5;${color}m ${color}\t\e[0m"
            #Display 10 colors per lines
            if [ $((($color + 1) % 10)) == 0 ] ; then
                 echo #New line
            fi  
       done
       echo #New line
  done

return 0

}

DO256="no";
DO16="no";
SHOWHELP="no";

for i in "$@";do

    case $i in
      -256)
        DO256="yes";
        ;;  
      -16)
        DO16="yes";
        ;;  
      -h|--help)
        SHOW_HELP="yes";
        ;;  
    esac

done

[[ "$DO16" == "yes" ]] && color16;

[[ "$DO256" == "yes" ]] && color256;


[[ "$DO256" == "no" && "$DO16" == "no" ]] && SHOW_HELP="yes";

if [[ "$SHOW_HELP" == "yes" ]]; then

  echo "
Output ascii colors to the screen.

Usage:

 color.sh [OPTIONS]

Options:
 -16 (output ASCII 16-bit colors)
 -256 (output ASCII 16-bit colors)
 -h (output this help message)
"

fi