Eh, don't go looking too far. Most fruit and vegetables these days, if they aren't for local consumption, are treated either to preserve a natural color, to vivify the color, or to apply a completely fake color (flight bananas are picked yellow. Boat bananas are picked green and left to ripen on the boat - unfortunately, ripening without being attached to a plant means they stay greener, so they're sprayed to become unnaturally yellow).
Tomatoes these days are usually grown in hydro-culture - makes for bigger and fatter tomatoes, faster, but with less taste and more orangey pinkish than red. The taste they don't really care about (since by the time you taste them, you already bought them), but the color is added as an additive to the water the plants are grown in.
I used to live in the tomato capital of Belgium (sounds ridiculous, but we used to produce a decent percentage of all Western European tomatoes way back when
); I actually saw "real" tomato plants 4 meters high getting replaced with these crappy 2 meter junk planted in tubes of what looked like blood. Quite....odd.