1.30.3 Send methods

colour ->initialise: name=[name], red=[0..360], green=[0..255], blue=[0..255], alpha=[0..255], model=[{rgb,hsv}]

Create a colour from a name and/or numeric components.

Named colours improve readability — @colour_names maps well-known names (the SVG/CSS palette) to RGB triples. Names in the form #RGB, #RGBA, #RRGGBB or #RRGGBBAA are interpreted as CSS hex literals.

When name is @default, the colour is built from the numeric components. The default model is rgb and each component is an integer 0..255. The first component is therefore named red but actually carries the hue (0..360) when model=hsv.

Examples:

new(C1, colour(red))               %% named
new(C2, colour(@default, 255, 0, 0))           %% RGB triple
new(C3, colour(@default, 180, 50, 50, 255, hsv)) %% HSV

See colour<-hue/colour<-saturnation/colour<-value for the HSV model.

colour ->unlink:

Drop the colour from @colours and release any per-colour resources. Called automatically on destruction.

colour ->equal: colour

Succeed if both colours have the same encoded RGBA value. Use in preference to comparing object references because two colour(@default, ...) literals can yield distinct objects with identical components.