There are classes that have 3 mount colors, depending on your chosen spec.
There are other classes that have 3 or 4 colors and can choose the color they want regardless of the chosen spec.
And I ask, why? What do you remember right now, the warrior, or the dk can't choose the frame color. But the paladin if they can. This doesn't make sense. It would be good to be able to choose the frame color regardless of the spec. , like the paladin or the warlock.
I would like to know, who is the blizzard genius who messes up decisions like this ... he must be a real useless ...