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Home/Color Blindness Simulator
Accessibility Tools

Color Blindness Simulator

Test how your designs, images, and websites appear to people with different types of color vision deficiency. Make your digital content more accessible with this easy-to-use simulator.

Drag & drop an image here

or

Supported formats: JPEG, PNG, GIF, SVG, WebP, and more.
All processing happens in your browser - files are not uploaded to any server.

Designing for Color Blindness Accessibility

Do:

  • ✓Use strong contrast between text and background
  • ✓Include patterns or textures to differentiate areas in charts and graphs
  • ✓Use labels or icons in addition to color coding
  • ✓Test designs with color blindness simulators (like this one)
  • ✓Use colorblind-friendly palettes like blue/orange instead of red/green

Don't:

  • ✗Rely solely on color to convey important information
  • ✗Use red and green together as contrasting colors
  • ✗Place blue and purple adjacent to each other without clear borders
  • ✗Use low contrast between text and background colors
  • ✗Design interfaces where color is the only visual cue

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Color Blindness Statistics

8%

of men have some form of color vision deficiency

0.5%

of women have some form of color vision deficiency

300M+

people worldwide are affected by color blindness

WCAG Accessibility Guidelines

The Web Content Accessibility Guidelines (WCAG) provide recommendations for making web content more accessible to users with disabilities, including those with color vision deficiency:

1.4.1 Use of Color (Level A)

Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element.

1.4.3 Contrast (Minimum) (Level AA)

The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, with a few exceptions for large text, incidental text, and logotypes.

1.4.11 Non-text Contrast (Level AA)

The visual presentation of user interface components and graphical objects have a contrast ratio of at least 3:1 against adjacent colors.

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