Comment by hombre_fatal

> what foods do you regularly eat that depend on having a specific color?

Probably all of them. We are super sensitive to colors.

Red meat and fish like tuna and salmon have carbon monoxide and sodium nitrate treatment just to keep them red because that's how people think they can judge quality.

> Consumers will pay up to $1 per pound more for darker colored salmon compared to salmon with lighter hues, according to research by DSM, a company that supplies pigmenting compounds to the salmon feed industry.