Hue channel in Euclidean distance formula?

[danburzo]

Moving from here:

For HSL — and, for that matter, all spaces that contain a hue element — the Hue will have an inordinate impact, since it's in the range [0, 360), while the other components are in the range [0,1]. We also need a way to perform hueDistance (shortest path) rather than normal distance between them.