colour<-saturnation

colour <-hue: -> 0..360

colour <-saturnation: -> 0..100

colour <-value: -> 0..100

Query the colour in the HSV (Hue/Saturation/Value) model:

colour<-hue selects the basic colour (think of it as a position on the rainbow);
colour<-saturnation is how intense the colour is â 0 is grey, 100 is fully saturated;
colour<-value is brightness â 0 is black, 100 is white. HSV is more convenient than RGB for shading and palette arithmetic. Colours may be created in this space via colour->initialise with model=hsv. Reasoning in colour spaces is beyond the scope of this manual.