color.spad line 95 [edit on github]
This domain describes four groups of color shades (palettes).
bright(c) sets the shade of a hue, c, above dim, but below pastel.
coerce(c) sets the average shade for the palette to that of the indicated color c.
dark(c) sets the shade of the indicated hue of c to it's lowest value.
dim(c) sets the shade of a hue, c, above dark, but below bright.
hue(p) returns the hue field of the indicated palette p.
light(c) sets the shade of a hue, c, to it's highest value.
pastel(c) sets the shade of a hue, c, above bright, but below light.
shade(p) returns the shade index of the indicated palette p.