is a color directive with lightness l, chroma c, and hue h.

specifies opacity α.


  • 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:
  • llightness, approximate luminance
    cchroma, color saturation
    hhue, 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. »
  • indicates that graphics primitives 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].
Introduced in 2014
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