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Ochre pigment. Ochre ( / ˈoʊkər / OH-kər; from Ancient Greek ὤχρα (ṓkhra), from ὠχρός (ōkhrós) 'pale'), iron ochre, 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 ...
Umber is a natural brown pigment extracted from clay containing iron, manganese, and hydroxides. [11] Umber has diverse hues, ranging from yellow-brown to reddish-brown and even green-brown. The color shade varies depending on the proportions of the components. When heated, umber becomes a more intense color and can look almost black.
Earth pigment. A range of pigments were mined by Indigenous Australians at this Ochre Pit in central Australia. Earth pigments are naturally occurring minerals that have been used since prehistoric times as pigments. Among the primary types of earth pigments include the reddish-brown ochres, siennas, and umbers, which contain various amounts of ...
In the RGB color space it is a secondary color numerically halfway between gamma-compressed red and yellow, as can be seen in the RGB color wheel. The complementary color of orange is azure . Orange pigments are largely in the ochre or cadmium families, and absorb mostly blue light.
The color to the immediate right (color #A52A2A) that was chosen as the web color "brown"—a medium dark red—is the color traditionally called red-brown. That this color is a shade of red and not orange can be easily ascertained by inspecting its h (hue) code, which is 0, signifying a shade of red. The first recorded use of red-brown as a ...
Ochre brown: RAL 8002: Signal brown: Extra camouflage colour (to RAL 7021) for vehicles of the Wehrmacht before 1940 RAL 8003: Clay brown: RAL 8004: Copper brown: RAL 8007: Fawn brown: U5 line of the Berlin U-Bahn: RAL 8008: Olive brown: RAL 8011: Nut brown: RAL 8012: Red brown: RAL 8014: Sepia brown: RAL 8015: Chestnut brown: RAL 8016 ...
Goethite ( / ˈɡɜːrtaɪt /, [6] [7] US also / ˈɡoʊθaɪt / [8] [9]) is a mineral of the diaspore group, consisting of iron (III) oxide-hydroxide, specifically the α- polymorph. It is found in soil and other low-temperature environments such as sediment. Goethite has been well known since ancient times for its use as a pigment (brown ochre ).
Raw sienna is a yellowish-brown natural earth pigment, [1] composed primarily of iron oxide hydroxide. The box shows the color of the pigment in its natural, or raw state. It contains a large quantity of iron oxide and a small quantity (about five percent) of manganese oxide. This kind of pigment is known as yellow ochre, yellow earth, limonite ...