Category Testing and Applying Paint

The gap between a paint color that looks right and one that actually performs right is almost always a testing problem rather than a color problem. This subcategory covers the step-by-step formula for testing paint before committing — including the two-coat rule, the two-wall rule, the correct sample size, and how long to leave a sample up before the result is reliable — plus the technical method for reading undertones using RGB and HEX values when the eye alone is not enough.