Color contrast
What the rule requires
Text must stand out from its background by a measured ratio — 4.5:1 for body text — so readers with low vision can actually read it. Measured, not eyeballed.
How Proof clears it
Measures the real rendered contrast of every piece of text in the document.
Compresses the problem: hundreds of failing text runs usually trace back to two or three template colors, so Proof groups them into a handful of high-leverage decisions — one document-wide swap first, then per-area, then per-line.
Suggests compliant replacements; your reviewer accepts or adjusts each decision, then Proof applies everything in one pass and re-measures to confirm.
Filters false alarms: template text hidden behind full-bleed cover artwork is detected and auto-dismissed.
What to expect
Text over photos gets a solid backing band instead of a recolor — a visible design choice, so it’s always yours to approve. A few print-production color setups are routed to source-level fixing rather than risked, and when a background is already at its limit Proof tells you the honest fix is darkening the text.