[andreareina]

HCL keeps the perceptual uniformity and I think is friendlier than L\a\b\*.

    Almost any color scheme you choose which has enough 
    lightness contrast will tend to look okay, especially if 
    you avoid picking colors which are outrageously colorful.

Solarized[1] is a color scheme that did that and I think it's great.

[1] http://ethanschoonover.com/solarized

[jacobolus]

LCh is just the cylindrical coordinates of CIELAB. It’s the same model.

(Ideally I would include asterisks and subscript ab in the symbols LCh to distinguish this from e.g. the cylindrical coordinates for CIELUV, but this forum doesn’t support it.)