Formerly fission-suite/kit. Search finds this package by either name.
HSL color function.
Which takes the parameters h, s and l.
Where h is max 360 (degrees), s max 100 (pct) and l max 100 (pct) as well.
So given the CSS statement hsl(232.7, 20.3%, 12%), you'd say:
hsl 232.7 20.3 12RGB color function.
Which takes the parameters r, g and b.
Each of which have a maximum value of 255.
Equivalent to the standard CSS rgb usage.
rgb 255 255 255