Color Vision Simulator

Preview how images may appear with common color vision deficiencies (color blindness), including deuteranopia, protanopia and tritanopia. Compare original and simulated views side by side.

Add an image, then compare it in parallel or with the interactive slider. Use the View controls to zoom. Export the current or all simulations as PNGs or copy the current view to the clipboard.

Images are processed locally in your browser and are never uploaded or stored on a server.

Drop image here

use Ctrl/Cmd+V or find it locally via “Choose”. Supports PNG, JPG, WebP, SVG, and other browser-compatible image formats. No image loaded yet.
Simulation
Model i Simulation model

Different scientific models produce slightly different results.

Brettel (1997)

Established reference for color blindness: protanopia, deuteranopia, and tritanopia.

Machado (2009)

Well suited for graded color weaknesses such as deuteranomaly, protanomaly, and tritanomaly.

HCIRN / Coblis

Matches the well-known Coblis simulator and is useful for direct comparisons with its results.

Differences are especially visible with blue/violet tones and tritan simulations.
View

Original

Simulation

Deuteranomaly – green weakness

Shifted M-cone sensitivity: the most common form; green/red differences become smaller and harder to distinguish.

Prevalence

i Rough orientation in 1:x format. Values are rounded and may vary by population and source; acquired color vision disorders are not fully represented.
Male1:20 Female1:250 Total1:37
Color Vision Simulator v1.3.6