Some Cheetos and Doritos will look a little different soon.  Starting in December, stores will sell Simply NKD versions of the popular snack that have no artificial flavors or dyes — meaning no bright orange color, PepsiCo announced Thursday. The move comes following a push by Health and Human Services Secretary Robert F. Kennedy Jr. to get rid of synthetic food dyes in the nation's food supply. The Food and Drug Administration asked the industry to stop using dyes in April, but stopped short