3 ms·

See also http://www.hsluv.org http://www.hsluv.org for a perceptually uniform colour space based on CIELUV.

amelius 10y ago
I'm not convinced. Picking one fresh-looking color, and sliding the "H" slider, I'm running into non-fresh (dull) looking colors. Or is that somehow supposed to happen?
- aardvark179 10y ago
  What sort of computer are you viewing it on? On my mac and ipad the colours work very predictably, but on my work Linux box (which has absolutely no colour calibration) I see huge changes round the red and purple areas of the h slider.
  - amelius 10y ago
    I'm on Linux.
- boronine 10y ago
  In a sense, yes. The true "freshness" of a color is shown on the color picker as the distance from the center of the circle. This is equivalent to the chroma component of CIELUV, the color space that HSLuv is based on. The problem with that component is that the maximum chroma is different for different hues, so if you were to move the hue slider while keeping true chroma static, you would run into impossible colors (such as dark saturated yellow). This is a fundamental trade-off. If you need true saturation, you can use CIELUV and deal with impossible colors. If you need a color space that doesn't have gaps, use HSLuv and deal with a suboptimal saturation. The strongest claim I can make about HSLuv's usefulness is that it is a better HSL. Hope that helps. EDIT: You gave an idea that it would be useful to show another slider on the picker called "C", showing the chroma component with gaps.
  - amelius 10y ago
    > You gave an idea that it would be useful to show another slider on the picker called "C", showing the chroma component with gaps. Yes, that would be nice. But as I understand it, fixing C would cause the H slider to show gaps too (?) Also, if you show sliders for H, S, L and C, then I think it would not be clear from the interface which sliders are fixed.
    - boronine 10y ago
      Good points. Hmm. Needs more thought :)

I'm not convinced. Picking one fresh-looking color, and sliding the "H" slider, I'm running into non-fresh (dull) looking colors. Or is that somehow supposed to happen?

aardvark179 10y ago
What sort of computer are you viewing it on? On my mac and ipad the colours work very predictably, but on my work Linux box (which has absolutely no colour calibration) I see huge changes round the red and purple areas of the h slider.
- amelius 10y ago
  I'm on Linux.
boronine 10y ago
In a sense, yes. The true "freshness" of a color is shown on the color picker as the distance from the center of the circle. This is equivalent to the chroma component of CIELUV, the color space that HSLuv is based on. The problem with that component is that the maximum chroma is different for different hues, so if you were to move the hue slider while keeping true chroma static, you would run into impossible colors (such as dark saturated yellow). This is a fundamental trade-off. If you need true saturation, you can use CIELUV and deal with impossible colors. If you need a color space that doesn't have gaps, use HSLuv and deal with a suboptimal saturation. The strongest claim I can make about HSLuv's usefulness is that it is a better HSL. Hope that helps. EDIT: You gave an idea that it would be useful to show another slider on the picker called "C", showing the chroma component with gaps.
- amelius 10y ago
  > You gave an idea that it would be useful to show another slider on the picker called "C", showing the chroma component with gaps. Yes, that would be nice. But as I understand it, fixing C would cause the H slider to show gaps too (?) Also, if you show sliders for H, S, L and C, then I think it would not be clear from the interface which sliders are fixed.
  - boronine 10y ago
    Good points. Hmm. Needs more thought :)