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Indigo dye is a greenish dark blue color, obtained from either the leaves of the tropical Indigo plant ( Indigofera ), or from woad ( Isatis tinctoria ), or the Chinese indigo ( Persicaria tinctoria ). Many societies make use of the Indigofera plant for producing different shades of blue.
Indigo dye is an organic compound with a distinctive blue color. Indigo is a natural dye extracted from the leaves of some plants of the Indigofera genus, in particular Indigofera tinctoria . Dye-bearing Indigofera plants were commonly grown and used throughout the world, particularly in Asia, with the production of indigo dyestuff economically ...
ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. There are several mnemonics that can be used for remembering this color sequence, such as the name "Roy G. Biv" or sentences such as "Richard of York Gave Battle in Vain". History
It is an approximation of the color violet at about 400 nanometers as plotted on the CIE chromaticity diagram, in the middle of the violet range of from 380 nanometers to 420 nanometers, assuming indigo as a separate spectrum color from 420 to 450 nanometers. Other names for this color are middle violet or simply violet.
Spectral color classifications nm Newton * ISCC-NBS * Malacara CRC Handbook Hue * 380 Violet: Violet: Violet: Violet: 250° 390 250° 400 250° 410 249° 420 249° 430 Indigo: Blue: 249° 440 Blue: 247° 450 Blue: Blue: 245° 460 242° 470 238° 480 226° 490 Green: Blue-Green: 190° 500 Green: Cyan: Green: 143° 510 126° 520 Green: 122° 530 ...
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Indigofera sumatrana Gaertn. Indigofera tinctoria Blanco. Indigofera tulearensis Drake. Indigofera tinctoria [2], also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye .
Indigo dye Color coordinates; Hex triplet #091F92: sRGB B (r, g, b) (9, 31, 146) HSV (h, s, v) (230°, 94%, 57%) CIELCh uv (L, C, h) (20, 70, 264°) Source: Gallego and Sanz: ISCC–NBS descriptor: Vivid blue: B: Normalized to [0–255] (byte)
Persian blue comes in three major tones: Persian blue proper: a bright medium blue; medium Persian blue (a medium slightly grayish blue that is slightly indigoish); and a kind of dark blue which is referred to as Persian indigo, dark Persian blue, or regimental, that is much closer to the web color indigo.
Baptisia australis, commonly known as blue wild indigo or blue false indigo, is a flowering plant in the family Fabaceae (legumes). It is a perennial herb native to much of central and eastern North America and is particularly common in the Midwest, but it has also been introduced well beyond its natural range. [5]
Indigo dye. Several species, especially Indigofera tinctoria and Indigofera suffruticosa, are used to produce the dye indigo. Scraps of Indigo-dyed fabric likely dyed with plants from the genus Indigofera discovered at Huaca Prieta predate Egyptian indigo-dyed fabrics by more than 1,500 years.
