darken function

Darken or lighten colors by adding/subtracting to or hsv channel values

darken(x, add = 0, abs = NULL)

Arguments

• x: Color value or vector of colors
• add: Value to be added to the third hsv-channel. Can be a vector of length x, or a vector of any length if length(x)==1
• abs: Value to substitute for the third hsv-channel. If set, this overrides the setting for parameter add. Can be a vector of length x, or a vector of any length if length(x)==1

Returns

A color value or vector of color values of length x (or, if length(x)==1, the length of add or abs)

Examples

darken(ggcol(3),abs=0.5)