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So I set out to find tibbit a new palette... and fell down a rabbit hole. In the previous post I tried to use a grid of HSV colors to search for one. However, HSV is very imprecise. Changing one of the attributes of hue, saturation, or value, affects your perception of the other two values. Instead, there's a different color scale: LCh. LCh uses Luminance, Chroma, and hue. Hue is still a 360 degree circle that describes which color (red, blue, yellow, etc), but saturation and value has changed.

Starting off with Value -> Luminance. Luminance is defined as the "brightness relative to the brightness of a similarly illuminated white". Note that in the HSV scale in the previous post, as saturation goes down, the brightness seems to increase. On this LCh scale, as chroma goes down, brightness doesn't increase, but rather it's the same. It doesn't shift towards white, but a similarly colored grey. This is one way it's a superior scale. You'll notice that all colors here are uniform in lightness, The most saturated color is just as bright as unsaturated.

But what is "Chroma", and how is it different to saturation? Saturation is "colorfulness of an area judged in proportion to its brightness", while chroma is "colorfulness of an area judged as a proportion of the brightness of a similarly illuminated area that appears white or highly transmitting. It is how different from a grey of the same lightness such an object color appears to be". There's that subtle difference that I'm sure someone who's studied color theory could explain better. An important thing to point out is that chrome isn't a scale of 0 to 100% of color, but is unbounded. That's why there's some missing entries in the top left. Your monitor can't display chroma levels that high, although they exist in nature and some monitors can display higher chroma levels (called the P3 color gamut). For a moment I considered picking a color that only certain monitors/programs could display (to see if your monitor can display these colors, take a look at Display P3 vs sRGB in Color Palettes), but that'd be silly.

Finally, notice the difference in the hues between HSV and LCh. In the HSV scale, as we decrease saturation of blue, it changes to purplish. In this LCh scale, color is mostly uniform, but there is a problem in the blue section. While LCh diminishes this effect, it's still present at some blues. To resolve this, a new new scale was created: OKLCh
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