Some species may not natively have some colors available to them (ie the blue on ASD), but some people may genuinely really want that.
Would it be possible to have it be a rare mutation?
Like two brown dragons and one of the color zones suddenly has a green or random color. And then it's a rare chance to pass that swatch further down the bloodlines? That way it's a possibility for those who really want those colors, but it doesn't become too over saturated?
#Regarding skin crafting and species color limitations:
somber otter
forest lava
[Informational] (so responses may have full context)
The current plan is for dragons to have a particular color range for their species, and colors on the edge of, or outside of, that range will apear on higher rarity skins, and will have a higher rarity themselves, making it more difficult to pass. Not all colors outside of that range are planned to be represented.