What is added to red to make light pink?

Correct answer: White

Direct answer: B, white. Red is made lighter by mixing it with white. In colour theory, a lighter version of a colour produced by adding white is called a tint; therefore red plus white can produce a light pink tint, depending on the amount mixed. A is wrong because black lowers the value and produces a darker red, often called a shade. C is wrong because green is not used simply to lighten red; it is commonly treated as red’s complementary colour and may reduce or neutralise its vividness when mixed. D is wrong because blue changes the colour mixture toward a different hue rather than making a simple light pink. The exact appearance can depend on the pigments and their proportions, but for this school-level question the basic rule is clear: white increases lightness. Memory cue: white makes a tint, black makes a shade.