February 9, 2026
The ultimate color guideline for 2026
The single source of truth for web interface color systems as of early 2026. It merges technical specifications (color spaces, token architecture), human factors (psychology, accessibility), and implementation standards (CSS, dark mode). It is written for UI engineers, product designers, and system architects. It assumes you are building scalable, production-ready software, not one-off marketing flyers. This is not a tutorial on "how to pick pretty colors"; it is a standard for how to build robust color systems.