Indigo
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 | |
|---|---|
 Piece o indigo plant dye frae Indie, aboot 2.5 inches (6 cm) square. | |
| Wavelenth | 450–420(disputit) nm |
| Common connotations | |
| lyalty, releegion, spirituality, intuition | |
 Colour coordinates | |
| 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 |
| 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.
References
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