محاكي عمى الألوان.

PNG, JPG, WebP, GIF first frame, BMP or AVIF up to 25 MiB and 25 megapixels; PNG download. Up to 24 HEX colors. A screen-based approximation for typical sRGB displays, not a diagnosis or a vision test.

Colors are converted to linear sRGB and projected with the Brettel, Viénot and Mollon (1997) dichromat model using the public-domain libDaltonLens matrices. Severities below 100% interpolate between normal and dichromat vision, an approximation of anomalous trichromacy. Achromatopsia uses Rec. 709 luminance. Saturated colors can fall outside sRGB after simulation and are clipped. Confusion warnings compare CIEDE2000 differences before and after simulation; the threshold is a design heuristic. Individual color vision varies, and monitor calibration affects what you see. Transparency is preserved. Images stay in your browser.

A red and green bar chart (#cc3333 and #669933) drops from ΔE2000 61 to about 6 under deuteranopia, so the two series need labels or another contrast cue.