A practical guide to CSS prefers-color-scheme for dark/light mode: explains the media feature and browser support, detecting and applying user preferences with media queries and @supports, global and component-level theming, optimized images/icons, fallback strategies with custom properties, and accessibility tips emphasizing WCAG-compliant contrast.
Dark Mode isn’t just a trend—it reduces eye strain and saves energy, especially on OLED, making UI design more sustainable. The article outlines practical tips: pick OLED-friendly dark palettes, ensure accessible contrast (avoid pure black), optimize icons/images, and use system defaults. It also promotes broader sustainable practices—simpler UIs, compressed media, and adaptive color schemes—to cut power at scale.
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