Those were introduced from the New World.
I can't imagine a carrot any other color, thought orange was a sign it was high in beta carotene. Well, if you thumb through some catalogs these days or the heirloom sites, you will see veggies all sorts of colors.
My gdaughter loved my pumpkin pie. Well one of her friend's parents grew some white pumpkins. I think the flesh was orange IIRC. Anyway, I'd never done it from scratch but made pumpkin pies out of it. My gdaughter wouldn't eat them. I didn't notice a whole lot of difference, just you have to cook a lot of water out of the pumpkin so it will be thick enough for decent pies.
I grew white strawberries this year. Lacks the protein redden [Fragaria allergen A1] that makes the berries red, claims may not cause an allergic reaction to those who cannot eat the read, can’t be seen by birds (but a chipmunk liked them however]..has a more pineapple taste [sort of but nice sweet taste]..good ground cover.