Combination of color or spontaneous mutation?

[Dany12]

Color TAUPE = Blue peacock split Opal X purple peahen .
Color PLATINUM = Opal X Cameo .

Do color combinations exist to create new colors?
How to prove that it is a combination?

It is not a mutation of color and the other color has nothing to do!
How to explain the arrival of 2 mutated chicks in the case of the first TAUPE color?

 

[Dany12]

... in fact, everything is there ... !
https://www.backyardchickens.com/threads/combining-colors.461096/

 

[Rosa moschata]

If you suspect a color is the result of two or more mutations, the way to find out for sure is to cross a bird of the suspect color with another bird showing one of the assumed mutations but not the other(s). If first-generation offspring are visual for some color other than normal blue, then you've identified one of the mutations involved in the combined color. For example, if you cross a Peach with a Purple, you'll get offspring visual for Purple, in both sexes. That means that Peach involves Purple. If you cross Peach with Cameo, you'll get offspring visual for Cameo, in both sexes. That means Peach also involves Cameo. If Purple was anything other than a combination of Purple and Cameo, one or both of those crosses would result in birds showing normal blue coloration.

 

[Midnightman14]

Platinum is a combination of bronze and opal.

 

[Dany12]

OK but what is the scenario ...
I imagine ....
Croos of peahen Bronze and a male Opale.
All the peachick are BLUE split Bronze and split Opal.
But a young male (why often males?) Is different ... not Blue (future Platinum).
I don't think he can be split Bronze or Opal !
Then begins the 'fixation' of this new color.
This male is crossed with two blue peahens (if we are intelligent we choose QUALITY blue females!).
All born re Blue peachicks split Paladium .
Then crossing brothers and sisters and the new color is fixed!