Start with the symptom.
Most people do not arrive asking for color theory. They arrive asking why something looks wrong. These pages answer the question quickly, then route deeper into the right foundations and stakeholder guides.
Incident trace: slightly looser spread, controlled irregularity.
Why does skin look green on stage?
Usually because the light spectrum, wall spill, white balance, or camera correction is pushing skin into an ugly compromise zone.
Why do two cameras disagree on the same shot?
Because matching cameras is never automatic: sensors, settings, exposure, and transforms all have to be aligned deliberately.
Why do highlights blow out so fast?
Because the camera's usable range is being spent in the wrong place and the bright parts of the scene are crossing the line first.
Why do blacks look gray in the room?
Because black is being lifted by ambient light, display limitations, or weak scene contrast before your eye ever judges it.
Why do slides look washed out on LED?
Because contrast, brightness, processor assumptions, and room conditions are all attacking the deck at once.
Why does the wall look different than the laptop?
Because they are different display systems, often running different brightness, gamut, viewing, and signal assumptions.