Color Theory and Foundation Matching
Color Theory and Foundation Matching tests hue, value, and chroma, undertone diagnosis, corrector choice, and matching under real lighting. Expect questions on oxidation, neck matching, and neutralizing discoloration without overcorrecting.
Core rules
- Describe color by hue, value (light to deep), and chroma (muted to bright). Foundation choice depends on depth plus undertone: cool, warm, neutral, or olive.
- Swatch two or three shades along the jawline and neck, then check in natural daylight. Let the product sit for several minutes to judge oxidation.
- Use the color wheel: green neutralizes redness, peach or orange neutralizes blue-purple (undereye circles, bruises), yellow neutralizes purple, and lavender neutralizes sallow yellow.
- Correctors go only on the discolored area and are used sparingly before foundation. Sheer layers preserve texture better than a thick mask.
- Store lighting and camera flash change color perception; never match to the hand or to a face alone when the neck is visible.
Worked example
A client has warm olive skin, facial redness, and blue-purple under-eyes. Reasoning: a pink foundation will look ashy against the neck. Choose a yellow-olive foundation at neck depth, apply a thin green corrector only on the redness, and use peach under the eyes. Blend edges and check in daylight before setting.
Traps
Matching the hand, testing under warm salon bulbs, ignoring oxidation, overcorrecting redness until the face looks gray, and choosing a foundation that matches the face but not the neck.