Make a color more desaturated
Arguments
- col
a color object or vector of any of the three kinds of R color specifications, i.e., either a color name (as listed by colors()), a hexadecimal string of the form "#rrggbb" or "#rrggbbaa" (see rgb), or a positive integer i meaning palette()[i].
- shift
Numeric between 0 and 1, 0 will do zero desaturation, 1 will do complete desaturation. Defaults to 0.5.
Details
The colors will be transformed to HSL color space (hue, saturation,
lightness) where the saturation of the color will be modified. The
saturation of a color takes a value between 0 and 1, with 0 being black and
1 being white. The shift
argument takes a value between 0 and 1,
where 0 means that the saturation stays unchanged and 1 means completely
desaturated. As an example, if the saturation of the color is 0.6 and shift
is 0.5, then the saturation be set to the halfway point between 0.6 and 0
which is 0.3.
Examples
plot(clr_desaturate(terrain.colors(10), shift = 0.5))
plot(clr_desaturate(terrain.colors(10), shift = 0.9))
plot(clr_desaturate(rep("firebrick", 11), shift = seq(0, 1, 0.1)))