LCHColor

LCHColor[l,c,h]

represents a color in the LCH color space with lightness l, chroma c and hue h.

LCHColor[l,c,h,a]

specifies opacity a.

LCHColor["string"]

returns a color from an HTML color name etc.

LCHColor[color]

returns the LCH representation of color.

Details

LCHColor is a perceptual color space corresponding to a cylindrical transformation of LABColor with the a and b components represented in polar form in terms of c and h, allowing for easier interpretation of color parameters.
LCHColor is device independent and corresponds to the CIE color space with .
The parameters have the following interpretation:
l lightness, approximate luminance

c chroma, color saturation

h hue, cyclic color from red to yellow to green to blue
, , and where $TemplateBox[{a, *}, Superscript]=500 (f(x/x_n)-f(y/y_n))$ , and $TemplateBox[{b, *}, Superscript]=200 (f(y/y_n)-f(z/z_n))$ where , , and are color parameters, , , and are white point parameters in XYZColor, and is a piecewise function that is equal to for and for .
LCHColor allows any real number for l, c, and h.
RGBColor approximately corresponds to l between 0 and 1, c between 0 and 1.3, and h between 0 and 1.
ColorConvert can be used to convert LCHColor to other color spaces.
The alternative forms LCHColor[{l,c,h}] and LCHColor[{l,c,h,α}] can also be used. »
{LCHColor[…],p₁,…} indicates that graphics primitives p_i should be displayed in the color given.
Style[expr,LCHColor[…]] specifies that expr should be displayed with the specified color. »
For 3D surfaces, explicit LCHColor directives define surface colors; the final shading depends on lighting and contributions from specularity and glow. »
Glow[LCHColor[…]] specifies color independent of lighting. »
LCHColor[l,c,h,α] is equivalent to Directive[LCHColor[l,c,h],Opacity[α]]. »
If no opacity has been specified, LCHColor[l,c,h] is equivalent to LCHColor[l,c,h,1].