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Advanced Perceptual Contrast Algorithm (APCA) & OKLCH Accessibility Tool Kasuality Contrast Authority is the ultimate accessibility and color selection tool for modern designers and developers. Built for the future of web design, it goes beyond outdated legacy standards to bring you true perceptual contrast calculations. WHY CHOOSE CONTRAST AUTHORITY? The standard WCAG 2.1 algorithm is flawed and often produces false positives or negatives. We use the Advanced Perceptual Contrast Algorithm (APCA / WCAG 3.0) to dynamically calculate contrast based on font weight and size, ensuring your text is truly readable. NATIVE OKLCH SUPPORT Experience perfectly uniform chromatic transitions. Contrast Authority natively supports the OKLCH color space with Progressive Enhancement: modern browsers get vibrant, precise colors, while legacy browsers receive reliable HEX/RGB fallbacks. CORE FEATURES: ✨ Magic Fix: Click one button, and the engine automatically adjusts your text lightness (L) to meet the exact APCA target for your font size and weight. 🎨 Smart Suggestions: Get instant alternative palettes and minimal-change suggestions that pass accessibility tests. ⚡ Seamless Export: Copy your validated colors as CSS Variables instantly, or copy them in Figma format to paste directly into your design files. Stop guessing with legacy contrast tools. Design with absolute confidence. Powered by Kasuality.com
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