retrieve the hue of a Color object
Color object created with ColorTools[Color]
The Hue command returns the hue of a Color object, which is the angle scaled from 0. to 1.0 around the RGB color wheel where red is 0, green is 13, and blue is 23.
c≔〈RGB : 1 0 0〉
c≔〈RGB : 1 0.5 0.5〉
The ColorTools[Color][Hue] command was introduced in Maple 2017.
For more information on Maple 2017 changes, see Updates in Maple 2017.
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