CMYKColor[cyan, magenta, yellow, black] is a graphics directive which specifies that graphical objects which follow are to be displayed in the color given. CMYKColor[c, m, y, ...
ColorConvert[expr, colspace] converts color specifications in expr to refer to the color space represented by colspace.
To control how a 3D surface responds to simulated light, set its reflection properties. Mathematica lets you control the diffuse reflection of light on a matte surface and ...
CellBracketOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for cells that specifies settings for cell brackets.
LightRed represents a light red color in graphics or style specifications.
Color opens a dialog for choosing a color.
CellFrameColor is an option that specifies the color of the frame around a cell.
Blend
(Built-in Mathematica Symbol) Blend[{col_1, col_2}, x] gives a color obtained by blending a fraction 1 - x of color col_1 and x of color col_2.Blend[{col_1, col_2, col_3, ...}, x] linearly interpolates ...
ColorDataFunction[range, ...] is a function that represents a color scheme.
StringQ
(Built-in Mathematica Symbol) StringQ[expr] gives True if expr is a string, and False otherwise.