Color signaling has long provided us with visual clues about what to eat and what not to eat. Food dressed in fuzzy black and blue mold? No, thank you. Red meat fading to dull brown? Merely a case of ...

Now that the U.S. Food and Drug Administration has banned Red Dye No. 3, artificial food dyes are under increasing scrutiny.

When it comes to what we eat, it’s not just a matter of taste. What food and drink look like, the colors we see, have ...