Color Blindness Simulator
Preview a palette through common color-vision simulation matrices.
See your palette as others do
Around one in twelve men has some form of color-vision deficiency, and a palette that looks distinct to you can collapse into indistinguishable tones for them. This simulator previews your colors through the common types of color blindness so you can catch problems before shipping.
Seeing red and green merge, or a status indicator lose its meaning, makes accessibility concrete rather than theoretical. Use it to check that charts, buttons, and states stay distinguishable for everyone, and adjust the colors that fail.
Designing for everyone
Simulating protanopia, deuteranopia, and tritanopia shows whether a palette still communicates without relying on hue alone. The simulation runs locally, so your images stay private.
Frequently asked questions
What does the color blindness simulator do?
It applies approximate color-vision matrices to a pasted palette so you can compare normal and simulated swatches.
Which kinds of color blindness can it show?
Protanopia (no red cones), deuteranopia (no green cones), tritanopia (no blue cones), and a full grayscale view, each shown next to your original swatches.
How do I enter the palette?
Paste hex codes separated by spaces or new lines, like "#ff0000 #00aa00 #0055ff". Three-digit shorthand such as #f00 also works, and anything that is not a valid hex code is ignored.
How accurate is the simulation?
It uses simple 3×3 matrices applied to RGB values, which give a useful approximation but not a clinical model. Use it to catch colors that collapse together, and do not rely on color alone to carry meaning.
Related tools
Need a polished visual system? Bushe can help turn rough ideas into production-ready design.