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RAL is a colour management system used in Europe that is created and administered by the German RAL gGmbH [1] (RAL non-profit LLC), which is a subsidiary of the German RAL Institute . In colloquial speech, RAL refers to the RAL Classic system, mainly used for varnish and powder coating, but now plastics as well. Approved RAL products are ...
In the RAL Design System Plus, there are groups of colours every 10° of hue and additionally at 75°, 85° and 95°. Possible lightness values are 15% through 90% in steps of 5% for monochromatic shades of grey (i.e. C = 0%) and 20% through 90% in steps of 10% and additionally 85% and 93%.
The HSL and HSV model-builders took an RGB cube – with constituent amounts of red, green, and blue light in a color denoted R, G, B ∈ [E] – and tilted it on its corner, so that black rested at the origin with white directly above it along the vertical axis, then measured the hue of the colors in the cube by their angle around that axis ...
Physical descriptions of color can be additive (describes mixing of light, RGB) or subtractive (describes mixing of pigment or removal of light, CMYK). Descriptions based on human perception are based on some experimental results on humans. Some models and their variants are employed in parts of the color spaces listed below. [1]
A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or color-matching fans. Typically there are two different types of color charts: Color reference charts are intended
Apple's classic Mac OS and macOS operating systems have provided OS-level color management APIs since 1993, through ColorSync. macOS has added automatic color management (assuming sRGB for most things) automatically in the OS, but applications can explicitly target other color spaces if they wish to.