module RGBA:sig..end
RGBA colors
typet =int * int * int * int
red, green, blue and alpha values are integers in the range 0..255
include Rgba_names
val grey : t
val pale_grey : t
val dark_grey : t
val none : tnone = (0,0,0,0) is completely transparent black.
val label_color : t
val set_text_color : t -> unitOverrides the Theme TEXT_COLOR variable.
val lighter : t -> t
val darker : t -> t
val set_alpha : int -> t -> t
val transp : RGB.t -> t
val random_color : unit -> t
val find_color : string -> t