Talk to Jim Blanchard at www.pokerchips.com

He will give you all the info you need. His company makes customized chips.

Casino colors:

$1 white
$2.50 pink
$5 red
$10 blue
$20 yellow
$25 green
$100 black
$500 lavender

Blanchard's website shows all their colors as well as examples of customized chips.

Below is a scan of 3 of 7 colors I had made up for my own poker set with the family crest inlayed.