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What are OKLCH colors?

(jakub.kr)
856 points tontonius | 1 comments | 25 Aug 25 06:32 UTC | HN request time: 0s | source
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fidotron ◴[25 Aug 25 10:56 UTC] No.45012490[source]▶
> In the example above, you can see that the OKLCH colors maintain consistent blueness across all of the shades, while in the HSL example, the lighter shades drift to purple and the darker ones muddy out towards grayish.

There is a very clear shift towards green in the OKLCH lightness value change example, enormously more so than any purple vibe in the HSL example.

Clearly being able to select colours of the same perceptual intensity has value, but some of the claims here as to the benefits are exaggerated.

replies(4): >>45013045 #>>45014039 #>>45014182 #>>45015574 #
1. throwaway0123_5 ◴[25 Aug 25 16:24 UTC] No.45015574[source]▶
I don't know much about the science of colors and I imagine this is going to be very subjective but I would at "worst" describe the rightmost OKLCH color as blue-green (but probably just "light blue"). Meanwhile the two rightmost HSL colors I would not describe as blue at all. Second from right I would call "light purple" and the rightmost honestly looks grey to me (which is weird because the caption says the darker HSL values "muddy out towards greyish" but the leftmost values for OKLCH and HSL both look pretty blue to me).

Also if I use the macOS app "Digital Color Meter" I get essentially the same green value for the rightmost OKLCH and HSL colors (226 and 227 for "display native values" and 228 and 227 for sRGB).