Achromatopsia Simulator & Contrast Calculator Select two colors to see how they might appear with achromatopsia (grayscale vision) and check the WCAG contrast ratio change. Color 1 (e.g., Foreground) R:255 G:255 B:255 Color 2 (e.g., Background) R:0 G:0 B:0 Simulation View Original Pair Simulated (Achromatopsia) Contrast Analysis (WCAG) -- : 1 Original Contrast Ratio -- : 1 Simulated Contrast Ratio Download Simulation & Analysis (PDF)