Ochre (/ˈkər/ OH-kər; from Ancient Greek ὤχρα (ṓkhra), from ὠχρός (ōkhrós) 'pale'), or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand.[1] It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow.[2][3] A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as "red ochre" (or, in some dialects, ruddle).

    Color coordinates
Hex triplet#CC7722
sRGBB (r, g, b)(204, 119, 34)
HSV (h, s, v)(30°, 83%, 80%)
CIELChuv (L, C, h)(58, 87, 37°)
ISCC–NBS descriptorDeep orange
B: Normalized to [0–255] (byte)
Ochre pigment

The word ochre also describes clays coloured with iron oxide derived during the extraction of tin and copper.[4]

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