Sure, white, off white, creme or even pink or just about any color you can think of is not a problem and the same price will apply to most.
The samples I posted are on a picture of a bike that I happened to have on file and are to just get general ideas. The ones on my own bike at the top of the thread are matte black and are very subtle but quite noticeable also. A solid dark or even light grey would be nice with any color also. I think with the translucents the colors should either be pretty dark if they are to be the same color as the plastics, or black or grey would go good with those also.
Thanks for the interest, Matt