Dear 100 Hour Board,
So, I know that if you eat too many regular orange carrots, you can turn orange - but they don't only come in orange! If you ate too many purple carrots, would you turn purple? Or still orange? What if you are a mix of different colored carrots in enough quantity to turn you orange if they were only orange carrots? What then?!?
-Things That Keep Me Up At Night
If reddit is to be trusted, the thing that turns you orange from carrots is carotene (which is orange). (Further research proves reddit is correct!) White carrots do not have carotene, so you could probably eat as many of those as you want and not turn orange. Apparently purple carrots have "even more beta carotene than their orange cousins," and "When you consume too many carrots — or sweet potatoes, pumpkins, or any other food that is similarly high in carotene — excess beta-carotene will enter the bloodstream and be stored under the skin, thus giving it a yellow, orange or golden tint" (source). So it sounds like you'd only turn yellow or orange if you ate too many orange or purple carrots, or too many sweet potatoes, pumpkins, or winter squash. But alas, you will only turn orange, not a brilliant purple.
-guppy of doom