Red and yellow are the chief food colors, evoking the tastebuds and stimulating the appetite. Both red and yellow are also effective at grabbing attention. The fast food industry has claimed this combination for a good reason—because it is effective.
When it comes to dyeing foods pink and/or red, most sources agree that beets are the best option. They’re simple enough to incorporate into recipes as dye: simply use some of the liquid from canned beets, or boil or juice raw beets and use the resulting liquid.