Testing
Color Blindness Simulation
Tools that simulate color vision deficiencies: protanopia (no red), deuteranopia (no green), tritanopia (no blue), achromatopsia (no color). Chrome DevTools has a built-in simulator. Use to verify color is never the only indicator.
In plain terms
Tools that show your design as color-blind users see it, so you can check nothing relies on color alone.
Why this matters
Around 1 in 12 men and 1 in 200 women have color vision deficiency. Simulating it is the fastest way to catch anything that relies on color alone before those users hit the wall.