Contrast is a ratio, not a feeling

Contrast is objective

Color contrast can feel acceptable on one display and weak on another. A measured ratio gives the team a shared reference point instead of relying on personal perception.

Text size matters

WCAG thresholds differ for normal and large text. A pair that fails body copy may still be acceptable for sufficiently large, bold display text.

Design with margin

Aiming barely above a threshold leaves little room for font rendering differences and future color changes. Stronger contrast usually creates a more resilient system.