[CentOS] grub color on C6 (not)

I have tried more than half a dozen different combinations of the "color" 
command in my grub.conf file, and see nothing but black and white.

Is there
* a problem with the Centos grub command?
* a problem with grub figuring out how to do color on my hardware?
* a true-false day, when everything is either true or false, no in between 
grays, and no color?

scratching my head,
Ted Miller
Elkhart, IN, USA