gamutmax(LCHab) disagrees with the Colors.jl usage #125
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The max saturation of LCHab is defined as 1 in ColorTypes.jl.
ColorTypes.jl/src/operations.jl
Lines 16 to 17 in 0d5904e
However, in Colors.jl, the saturation comes from the a and b of Lab which are mostly in [-100,100].
https://github.com/JuliaGraphics/Colors.jl/blob/657e265a4cccc9fc32584f7f3505611537bfc79d/src/conversions.jl#L575-L580
Therefore, for the sake of convenience, 100 (or 128) is better for the max saturation, though the actual gamut is not so simple. (See also: #84)
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