Dark Mode Design Mastery: 4 Rules That Transform User Experience

Dark mode has evolved from a luxury feature to a user expectation, driven by OLED battery concerns and eye strain reduction. This guide reveals why simple CSS color inversion fails and outlines four critical design principles—from avoiding pure black to respecting system preferences—that create genuinely accessible and beautiful dark interfaces. Implementing these rules positions dark mode as a core UX strategy that increases user retention and brand loyalty.