FIT SKJ colortable

#!/bin/bash

[ $# -eq 1 ] || exit 2
[ -z $1 ] && exit 2

colors=$(convert -list color | awk 'NR>5{print $1}' | grep -i $1)
[ -z "$colors" ] && exit 1
count=$(echo "$colors" | wc -l)
countchars=$(echo -n "$count" | wc -m)

i=1
for color in $colors;
do
convert -size 100x100 xc:$color $(printf "$1_%0${countchars}d.png" $i)
let i=i+1
done;
exit 0