HCL: a color model that actually matches our perceptions (2011)

Re:HCL: a color model that actually matches our perceptions ... by tgb on Wednesday April 06, 2016 @09:45AM (#11438708)

Well presented. Interestingly, I thought the RGB interpolation example at the end looked just as reasonable as the HCL interpolation. Though RGB was a little bland. But RGB should have been the 'dumbest' colorspace to interpolate in. Even trying random other colors the RGB always looked fine while the HCL, well, usually couldn't even come up with all the intermediate colors.

HCL actually seems to do very poorly interpolating towards black. Try #000000 and #AA0000. Apart from the missing color, the aparent hue changes significantly.

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Re:HCL: a color model that actually matches our perceptions ... by davidjohnstone on Wednesday April 06, 2016 @10:04AM (#11438822)

The missing colour in the #a00 to #000 interpolation is because HCL is trying to create a colour outside of sRGB (the green component is less than zero). As for the hue change, one difficulty of making a gradient to black in HCL is that black doesn't have a hue when specified as rgb(0, 0, 0), which seems to mess up some tools.

Edit: It's interesting to see how the different colour spaces react to the #000 being changed to #010000 or #000100 or #000001.

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