Color Vision Simulator
Compare your image across three common types of color-vision deficiency.
Color Blindness Simulator
Upload your thumbnail or image to see how it looks to users with different types of color vision deficiencies. This applies physical LMS cone response matrices at the pixel level.
Original
Normal vision
Protanopia
Red-blind (1% of men)
Deuteranopia
Green-blind (5% of men)
Tritanopia
Blue-blind (<1% of population)
Design Information That Does Not Depend on Color Alone
Color can communicate status, hierarchy and emphasis, but not everyone distinguishes the same hues in the same way. Red and green indicators, for example, may become difficult to tell apart when shape, text or position does not provide a second cue.
Upload one image to view the original beside simulations for protanopia, deuteranopia and tritanopia. The side-by-side layout helps you notice labels that blend into their background, chart series that become too similar, or calls to action that lose their visual emphasis.
Use the preview as an early design check, then strengthen weak areas with labels, icons, patterns, borders or improved light-and-dark contrast. The result is a visual approximation rather than a medical diagnosis, and individual perception varies, but it is a useful way to catch color-dependent design decisions before publishing.
- Original image reference
- Protanopia simulation
- Deuteranopia simulation
- Tritanopia simulation