AB coordinates are a bit unintuitive, it's easier to visualize hues around a circle and have separate values for luminance and chroma, that's why people who wor

AB coordinates are a bit unintuitive, it's easier to visualize hues around a circle and have separate values for luminance and chroma, that's why people who work with color usually prefer LCH/HCL (Luminance, Chroma, Hue). Chroma values in LCH differ between Hues, because each Hue has a different potential and max value. That's where HSLuv comes in, where chroma is a percentage value and therefore relative to the Hue, instead of an absolute one. This gives HCL similar usage ergonmics like HSL, thus the name HSLuv.