Hi Kris! I get color changes and there are two kinds that I have and not sure if you are going through the same thing or not! One is called Livedo Reticularis. A spider web type of change in the skin giving your legs and other areas of the body a splotchy look. It has a purplish look and mixed with like a reddish color and it looks like measles except for it's under the skin.
Another kind is Raynauds and that normally is in the hands and feet area causing them to turn blue looking or purplish looking when exsposed to cold air or cold water.
Does this sound like what you are going through. It is online about both types of disorders and can explain better than I but I do have these both. Both are basically a symptom of something auto immune going on! Hope this helps! New here!