Web Performance SEO: Accessibility Contrast Error Fix When to use - PSI/Lighthouse accessibility shows "!" or error instead of a numeric score - color-contrast audit errors or getImageData failures - Need to improve accessibility signals that impact SEO Workflow 1. Reproduce - Run Lighthouse or PSI; capture failing audit names. 2. Scan code for common triggers - CSS filters/backdrop blur, mix-blend-mode - OKLCH/OKLAB colors - Low opacity backgrounds (< 0.4) - Gradient text with color: transparent - Text over images without opaque overlays 3. Fix in priority order - Remove filters/blend modes…