Color-enhancing shampoos combine a surfactant base with which colors?

• A. Neon colors
• B. Primary colors
• C. Complementary colors
• D. Basic colors

Answer: (D)

The main idea is that color-enhancing shampoos work by cleansing the hair while depositing small amounts of pigment to refresh and enrich the existing color. The pigments used are standard, everyday color tones—basic colors—chosen to subtly reinforce the shade you already have, rather than introducing a bright neon look or a highly specific color tweak. This keeps hair looking more vibrant and even between chemical services without drastic changes. Neon hues would be too vivid for regular use, primary colors would risk an unpredictable tint, and complementary colors are used mainly to cancel or neutralize unwanted tones rather than to enhance the color overall. basic colors provide a safe, natural-looking option for maintaining and enhancing color.