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Contrast Ratio for Readability
Contrast ratio for readability keeps text and background luminance far enough apart—weak grays in dark mode still cause squinting and eye fatigue.
Contrast ratio for readability is the luminance difference between text and background—low contrast forces squinting and extra accommodation effort on long reads. Dark mode is not automatically safer if grays are too faint.
WCAG-friendly contrast and slightly larger type reduce strain more than trendy palettes.
Common questions
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Does dark mode always reduce eye strain?
Only when contrast stays strong—faint gray on black still strains. Pick themes with clear text edges and bump font size before marathon reading sessions.
Related terms
Put Contrast Ratio for Readability into practice
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