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Artist Paints & Pigments - Pigment Database
Information on 67243 art products (colored pencils, pastels, watercolor, acrylic, gouache, oil paints etc.) with 15816 color samples which you can browse, sort, view as a chart, and compare.
The Color of Art: Pigments Database - Index - Art is Creation
PIGMENT DATABASE Swatch Card Color Charts for Watercolor …