[ALUG] Where do I find colour names?

Where can I find the file that lists the X colour names? E.g. where are things like 'grey90', 'magenta4' and 'blue3' defined? I can find it on my Solaris machine at work but not on my Linux box at home. -- Chris Green (chris@areti.co.uk) "Never ascribe to malice that which can be explained by incompetence."