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RAL Design System, RAL-DS

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RAL Design System, RAL-DS (In French système RAL) color sample system introduced by Ludwig Gall in 1993 for varnishes and paints in product and room design, e.g. car body paints, painting materials or textile colors. Gall extended the RAL 840-HR from 194 to 1688 color shades and placed it on a CIELAB and/or CIELCH basis (written HLC, maximum 80 grades), whereby all neighboring color samples have a color difference of ΔE*ab = 10 with respect to each other.