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Dev tools · November 23, 2025

AO

An OKLCH-based perceptually uniform color system/theme builder

I've been using a version of this internally for a few months but decided to polish it a little to finally deploy it. It's a color system generator that creates accessible, perceptually uniform color palettes using the OKLCH space. It takes one seed (primary) color, generates relative key colors from multiple color harmony schemes (analogous, complementary, etc) that are then used to create 26-step color ramps each. Shades from the ramps are then used to generate semantic color roles, or can be used for creating custom palettes. All colors are gamut-mapped to the sRGB gamut with chroma…

An OKLCH-based perceptually uniform color system/theme builder launched on November 23, 2025 with 5 votes, #4,178 of 9,796 launches that month and more than 75% of that year's launches.

What it does

Perceptually uniform color palette generator.

In the maker’s words, at launch

I've been using a version of this internally for a few months but decided to polish it a little to finally deploy it. It's a color system generator that creates accessible, perceptually uniform color palettes using the OKLCH space. It takes one seed (primary) color, generates relative key colors from multiple color…

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Source: Show HN post ↗ · launch text quoted in part

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