My Cigar chips...redesign?. Discuss My Cigar chips...redesign?, on ChipTalk.net the place to go for your Poker chips and gambling tips. Read it in Custom Chips General.
Considering what the chips are based on, I don't think you can change the yellow to something else. I think the chips would loose a lot. You could try a darker version of the base colors, but I don't think it would work too well. Maybe just take the rim color off.