All guppies will start off with a base color. That could be grey, blonde, golden, bronze, nigrocaudatus, olivegreen/grey, asian blau and white. When aging, the second colors will show up that might cover the base color partially or total. A second color that starts to develop doesn't mean that that will be the color to stay. For instance a definite second color like red, "may" start off as yellow, white or even blue instead of red. This means that they carry those those other colors as well but won't be the dominant. That's quite normal.
And with guppies of mixed blood, it's not always easy to determine what the outcome might bring.
