Modify standard R colour in hcl colour space.

Source: R/colour-manip.r

Transforms rgb to hcl, sets non-missing arguments and then backtransforms to rgb.

col2hcl(colour, h = NULL, c = NULL, l = NULL, alpha = NULL)

Arguments

colour

character vector of colours to be modified
h

Hue, [0, 360]
c

Chroma, [0, 100]
l

Luminance, [0, 100]
alpha

Alpha, [0, 1].

Examples

reds <- rep("red", 6)
show_col(col2hcl(reds, h = seq(0, 180, length = 6)))
show_col(col2hcl(reds, c = seq(0, 80, length = 6)))
show_col(col2hcl(reds, l = seq(0, 100, length = 6)))
show_col(col2hcl(reds, alpha = seq(0, 1, length = 6)))