Finding unique CSS colors with grep and perl

Just a tiny one-liner I’ve found useful to get unique CSS color values in a style sheet:

egrep -r '#[a-fA-F0-9]{3,6}+(\s|;)' *.css|perl -ne 'if (m/(#[a-fA-F0-9]{3,6}+)(\s|;)/){print "$1\n";}'|sort|uniq

Suggestions and improvements are welcome!

It's only fair to share...