Editing Color wheel (section)

====Additive====
A color wheel based on [[RGB]] (red, green, blue) additive primaries has cyan, magenta, and yellow secondaries. Alternatively, the same arrangement of colors around a circle can be described as based on cyan, magenta, and yellow subtractive primaries, with red, green, and blue being secondaries. Sometimes a RGV (red, green, violet) triad is used instead. In an additive color circle, the center is white or gray, indicating a mixture of different wavelengths of light (all wavelengths, or two complementary colors, for example).

[[File:Hsv color circle.svg|thumb|A color wheel based on [[HSL and HSV|HSV]], labeled with HTML color keywords.]]
The [[HSL and HSV]] color spaces are simple geometric transformations of the [[RGB color space|RGB]] cube into cylindrical form. The outer top circle of the HSV cylinder – or the outer middle circle of the HSL cylinder – can be thought of as a color wheel. There is no authoritative way of labelling the colors in such a color wheel, but the six colors which fall at the corners of the RGB cube are given names in the [[X11 color names|X11 color list]], and are [[web colors#HTML color names|named keywords in HTML]].<ref>{{cite web|url=http://www.w3.org/TR/REC-html40/types.html#h-6.5|title=Basic HTML data types|publisher=[[W3C]]|work=HTML 4.01 Specification|date=24 December 1999}}</ref>