function to output color from a HSL (hue, saturation, lightness) palette.
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forgot reference, +minor stuff
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fixed a error in the rgb_to_hsl conversion algo, Thanks to @Lord_Voldemort for spotting it.
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fix to hsl function..
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rgb_to_hsl: a few colors still produced saturation, lightness above 100, this should be the final fix for it x_x ..