Inkscape - open source vector graphics

Inkscape uses HSLuv as one of the options in its color picker.

Polaris - design system by Shopify

Polaris uses HSLuv to generate its color palette with consistent contrast ratios.

SyntaxEnvy - random syntax highlighting themes

HSLuv is used in SyntaxEnvy to generate pleasing color palettes that have consistent contrast.

72yonk - Semantic Colour System

72yonk uses HSLuv to generate light and dark Figma themes.

Color Studio - theme builder

Color Studio uses HSLuv to help you design dark UI themes.

Seaborn - statistical data visualization library

Seaborn uses HSLuv to generate color palettes for its charts.

Rebelle - watercolor and acrylic paint software

Rebelle uses HSLuv as one of its options in the color picker.