Preview how your images appear to people with color vision deficiency. Simulate protanopia, deuteranopia, tritanopia, and other types of color blindness to ensure your designs are accessible to everyone.
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Color blindness simulator shows how images appear to people with various types of color vision deficiency (CVD). About 8% of men and 0.5% of women have some form of color blindness. This tool helps designers, developers, and content creators ensure their visual content is accessible to everyone by previewing how different color combinations appear to color blind users.
Protanopia (Red-Blind) - Complete absence of red cone cells. People with protanopia cannot perceive red light and often confuse red with black, dark brown, or green. Reds appear darker than normal. Affects approximately 1% of males.
Protanomaly (Red-Weak) - Reduced sensitivity to red light due to abnormal red cone cells. Red, orange, and yellow appear shifted toward green and less vibrant. This is a milder form of red-green color blindness. Affects approximately 1% of males.
Deuteranopia (Green-Blind) - Complete absence of green cone cells. Cannot distinguish between red and green colors. Similar to protanopia but without the darkening of red colors. The most common form of complete color blindness. Affects approximately 1% of males.
Deuteranomaly (Green-Weak) - Reduced sensitivity to green light due to abnormal green cone cells. Green and yellow appear redder, and it's difficult to distinguish violet from blue. The most common type of color vision deficiency overall. Affects approximately 5% of males.
Tritanopia (Blue-Blind) - Complete absence of blue cone cells. Confuses blue with green and yellow with violet or light gray. Very rare and affects males and females equally. Often acquired later in life due to aging or disease. Affects approximately 0.003% of the population.
Tritanomaly (Blue-Weak) - Reduced sensitivity to blue light. Blue appears greener and it's difficult to distinguish yellow and red from pink. Extremely rare form of color blindness. Affects approximately 0.01% of the population.
Achromatopsia (Monochromacy) - Complete color blindness where the world is seen only in shades of gray. Caused by non-functioning or absent cone cells. Often accompanied by light sensitivity, poor visual acuity, and nystagmus. Affects approximately 0.003% of the population.
Achromatomaly (Blue Cone Monochromacy) - Partial color blindness with severely reduced color perception. Only blue cones function normally, resulting in very limited color discrimination. Colors appear washed out and muted. Affects approximately 0.001% of the population.
Upload your image, infographic, chart, or design to test how it appears with different color vision deficiencies. Select a vision type from the dropdown to instantly see the simulated view. Test multiple types to ensure your color choices work for all audiences. Pay special attention to red-green combinations in charts, buttons, and important visual elements that convey meaning through color alone.
Use this simulator to improve your designs for color accessibility. Avoid relying solely on color to convey information - add patterns, labels, or icons as secondary indicators. Test data visualizations, UI elements, maps, and educational materials. Ensure sufficient contrast between colors and consider using color palettes specifically designed for color blindness accessibility.
Our simulator uses scientifically accurate color transformation matrices based on research by Brettel, Viénot, and Mollon. These matrices mathematically transform RGB values to simulate how colors appear with reduced or absent cone function in the human eye. The result provides a reliable preview of color perception across different types of color vision deficiency.