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HSLuv vs OKLCH Color Picker: catalog facts
HSLuv	OKLCH Color Picker
Best for: Developers and designers who generate colors programmatically and want even lightness	Best for: Front-end developers adopting OKLCH colors in CSS
Free The online picker is free to use.	Free Free to use in the browser.
Web	Web
Perceptually uniform alternative to HSL Saturation expressed as a simple percentage All 3 strengths for HSLuv Perceptually uniform alternative to HSL Saturation expressed as a simple percentage Interactive picker shows the color space directly	Converts HEX, RGB and HSL to OKLCH Shows sRGB fallbacks for wide-gamut colors All 4 strengths for OKLCH Color Picker Converts HEX, RGB and HSL to OKLCH Shows sRGB fallbacks for wide-gamut colors 3D model and graphs of the color space P3 and Rec2020 gamut display
Mainly a color space definition, so the web picker is fairly minimal Explaining CIELUV assumes some interest in color theory	Focused on a single color at a time rather than whole palettes Assumes some familiarity with OKLCH and color gamuts
Web application	Web application
Not open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for HSLuv hsluv.org Catalog checked October 2, 2026	Official website Full listing and sources Sources for OKLCH Color Picker oklch.com Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.