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The tertiary color on the HSV color wheel (also known as the RGB color wheel) precisely halfway between blue and magenta is called color wheel violet. This tone of violet—an approximation of the color violet at about 417 nanometers as plotted on the CIE chromaticity diagram —is shown at right.
Violet refers to any colour perceptually evoked by light with a predominant wavelength of roughly 380–450 nm. Tones of violet tending towards the blue are called indigo. Purple colors are colors that are various blends of violet or blue light with red light.
In formal color theory, purple colors often refer to the colors on the line of purples on the CIE chromaticity diagram (or colors that can be derived from colors on the line of purples), i.e., any color between red and violet, not including either red or violet themselves.
Although the web color "violet" may be called light violet it is technically actually a light magenta, since the red and blue values of the color are equal (which signifies for computer display that this color is a shade of magenta), and therefore another name for this color is lavender magenta, analogous to the colors lavender gray, lavender ...
In optics, violet is a spectral color (referring to the color of different single wavelengths of light), whereas purple is the color of various combinations of red and blue (or violet) light, some of which humans perceive as similar to violet.
This category is for all varieties of the color violet, not only shades in the technical sense.
Because magenta is located at a hue angle of 300°, it has a tertiary color range of 285° and 315°, and any color out of this range is more related to violet or rose than magenta. Magenta is not a spectral but an extraspectral color: it cannot be generated by light of a single wavelength .
The name fuchsia is used on the HTML web color list for this color, while the name magenta is used on the X11 web color list. They are both composed the same way, by combining an equal amount of blue and red light at full brightness, as shown in the image on the left.
The color displayed at right is old mauve. The first recorded use of old mauve as a color name in English was in 1925. The normalized color coordinates for old mauve are identical to wine dregs, which was first recorded as a color name in English in 1924. See also. Shades of purple. Lilac (color)
The typical artists' paint or pigment color wheel includes the blue, red, and yellow primary colors. The corresponding secondary colors are green, orange, and violet or purple. The tertiary colors are green-yellow, yellow-orange, orange-red, red-violet/purple, purple/violet-blue and blue-green.
