I agree with mgamer20o0, it depends on the strain. I have never succeeded producing one of many colors. Their main strain tends to blur..... bright yellow and white becomes dull and black becomes grayish.
I've even tried cross breeding with platy. Platy and black destroys the red, platy and white still unsatisfying, platy and yellow turns out quite cute: some turn orange and some half red half yellow. Btw their main color follow the female.
Mollies, platies, and guppies are basically the same, males crazily chase females that just gave birth.