Possible now to color yolks of eggs "red, white and blue" by feeding hens different feeds. Washington, D.C., April 7. Showing exactly how the yolks of eggs are colored - "Red, white and blue" - by feeding hens different feeds. if you want a deep orange-red color include in the hen's ration ground pimento or chili pepper. Charles A. Denton, Junior Chemist, poultry nutrition laboratory of the National Agriculture Research Center, Beltsville, Maryland, feeding a hen a certain food to produce a definite colored yolk.