[Karen W. (OP)]

Well this may be dumb but do they have certain pigmentation like we would have or what? I imagine it is in their Genetic code just like us, but are their different factors involved in the make up of a fishes color!

[_Stefan_]

It is genetic.
Other factors such as diet or dyes may contribute to intensifying colours, but these are external.

For more information I suggest you check out http://www.bettysplendens.com and various other sites you'll find if you google betta color genetics.

[Karen W. (OP)]

Thanks for the link Stefan! Thanks for the information also. Mostly genetic then. OK!