From Wikipedia, the free encyclopedia
Indigo is a colour that is tradeetionally regardit as a colour on the veesible spectrum, as well as ane o the seiven colours o the rainbow: the colour atween blue an violet. Altho tradeetionally considered ane o seiven major spectral colors, its actual poseetion in the electromagnetic spectrum is controversial. Indigo is a deep an bricht colour close tae the colour wheel blue (a primary colour in the RGB color space), as well as tae some variants o ultramarine.
Indigo | |
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![]() Piece o indigo plant dye frae Indie, aboot 2.5 inches (6 cm) square. | |
Wavelenth | 450–420[1](disputit) nm |
Common connotations | |
lyalty, releegion, spirituality, intuition | |
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Hex triplet | #4B0082 |
sRGBB (r, g, b) | (75, 0, 130) |
CMYKH (c, m, y, k) | (42, 100, 0, 49) |
HSV (h, s, v) | (275°, 100%, 51%) |
Soirce | HTML/CSS[2] |
B: Normalised tae [0–255] (byte) H: Normalised tae [0–100] (hunder) |
The colour indigo wis named efter the indigo dye derived frae the plant Indigofera tinctoria an relatit species.
The first recordit uise o indigo as a colour name in Inglis wis in 1289.[3]