Re: [csswg-drafts] Define rec2020 color space to use 2.4 gamma (#12574)

Clearly noticeable differences, for example here there is a ΔE2000 of 8.5 between the current and proposed transfer curves. More noticeable when components are in the 0.02 to 0.2 range.

<img width="1744" height="319" alt="Image" src="https://github.com/user-attachments/assets/c6fd364e-5bbb-4463-805d-4ce4572056ed" />

```js
let color2 = new Color("rec2020-gamma24", [0.4, 0.3, 0.05]);
let color3 = new Color("rec2020", [0.4, 0.3, 0.05]);

Color.deltaE(color2, color3, "2000");      // 8.51
Color.deltaE(color2, color3, "ok") * 100;  // 8.33
```

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Received on Tuesday, 5 August 2025 20:44:09 UTC