[Request] Colors of Pokemon variants which changes the Pokemon color

Currently the API only provides colors for a Pokemon's base species, but does not provide colors for any individual forms/variants. In a lot of cases this is probably fine, but in cases where a form/variant has drastically different colors this doesn't really make a lot of sense

Some examples would be:

• Alcremie. Listed under the "white" color, but whose shiny variant is black. Additionally the different "flavors" of Alcremie are all different colors
• Minior. Listed under "brown", but whose different cores are all different colors
• Charizard. Listed under "red", but whose mega evolution is black/blue

Some real world use cases for this information would be things like an application which changes an elements color to match the color of the currently displayed Pokemon (which is also my usecase)

Start by tracing the API's existing species color data and the individual form or variant resources mentioned in the issue. Determine how variant-specific colors should be represented for cases such as Alcremie, Minior, and Charizard; done means clients can retrieve the appropriate color for each relevant form or variant.