: Transformation between the hue color wheel and Itten's color wheel Unfortunately, the hue color wheel does not correspond to human visual perception: Equal differences of the hue angle are perceived
Unfortunately, the hue color wheel does not correspond to human visual perception: Equal differences of the hue angle are perceived as different color differences. E.g. yellow takes only a small range of angles in the color wheel, see de.wikipedia.org/wiki/Farbkreis, second figure, for an example.
There are correctives for this issue such as Itten's color wheel.
My question: Are there equations that translate the angle of the hue color wheel into that of Itten's color wheel and vice versa? Of course, an interpolation of values at distinct angles could also work but equations might be better. Distinct angles are given here: uxplanet.org/algorithm-for-automatic-harmonious-color-selection-for-the-image-fc26dde69ca1#.lnuwum51m, halfway down.
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Item's colour wheel is also clearly uneven perpetually and the colours vary between different printings and even on different pages of the same copy. If you want a more perpetually even space use either Munsell or Lab space. Photoshop converts between rgb hue angle and Lab coordinates and you can easily calculate a hue angle from the a and b coordinates of Lab.
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