A RGBA color.

A CMYK color.

to_int c converts the color to 0xRRGGBB where RR, GG and BB are the red, green and blue values expressed on 2 hexadecimal digits. The alpha value is ignored. This is convenient to interact, say, with the Graphics module.

of_int_exn i returns the color provided as 0xRRGGBB.

• raises Invalid_argument

  if i does not represent a color.

• parameter a

  the transparency component of the color. Default: 0.

of_int is the similar to of_int_exn except that it returns None instead of raising an exception.

to_string c converts the color to a string of the form #RRGGBB.

hue h return the color corresponding to the hue h ∈ [0., 360.).

hue h return the color corresponding to the hue h ∈ [0., 1.).

range ~n a b generates a uniform sampling of n points between a and b (with the bounds a and b included in the list of points) together with colors (based on hue at the moment).

• parameter grad

  generate colors using the given gradient. Default: use the hue.

with_colors l add a color range to the list l.

• parameter grad

  generate colors using the given gradient. Default: use the hue.

Find a color map according to certain characteristics.