I envision a beautifully colorful potato salad utilizing multiple colors of potatoes. But would a cooked mixture be like carrots with potatoes (minimal bleed) or like beets with anything else (maximum bleed)?

Lorraine Bauder
Sudbury, Mass

The red and blue pigments in the new potato lines are “water soluble and will leach,” notes USDA’s Charles R. Brown. However, unpeeled potatoes bleed minimally. Potatoes tinted yellow to orange shouldn’t bleed at all because their carotenoid pigments aren’t water soluble .—J. Raloff