Though it isn't a new technique, color-correcting makeup has surged in popularity over the past few years. The concept is simple: it plays upon the color wheel from your elementary school art class.

Procter & Gamble’s Crest has enlisted seven-year-old social media influencer Brody Hudson Schaffer as the official “Kid Correspondent” for its new Crest Kids Color Changing Toothpaste. Specifically ...