SyntaxEnvy - random syntax highlighting themes

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

SyntaxEnvy screenshot

Color Studio - theme builder

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

Color Studio screenshot

Seaborn - statistical data visualization library

Seaborn uses HSLuv to generate color palettes for its charts.

Seaborn screenshot

Rebelle - watercolor and acrylic paint software

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

Rebelle screenshot