Guides
Short answers first, then the detail, with sources.
How to match a paint color from a photoMatch a wall, a cushion or a tile to a paint color from a photo: how to take the picture, where to tap, how to read ΔE, why light changes everything and when to buy a sample.What is LRV in paint?LRV, light reflectance value, tells you how much light a paint color reflects, from 0 for black to 100 for white. What the numbers mean in a room, how they are measured and how to use them.Types of color blindnessThe types of color blindness, from deuteranomaly to achromatopsia: which cones are affected, which colors get confused, how common each is, how it is inherited and how it is tested.What do color blind people see?What color blind people see, type by type: the same photo simulated for deuteranopia, protanopia and tritanopia, the color pairs that get mixed up and where it matters in daily life.HEX, RGB, CMYK and Pantone: what each code is forHEX and RGB are for screens, CMYK is for printing, Pantone is for exact printed inks and RAL for paint and coatings. What each code means, how they convert and which one to send to whom.RAL vs Pantone vs paint brandsRAL is a color standard for paint and coatings, Pantone for printed inks, and paint brands have their own catalogs. How they differ, how RAL codes work and how to get from one to another.