Color Blindness Simulator
Free online color blindness simulator that runs entirely in your browser.
How the Color Blindness Simulator works
The Color Blindness Simulator works on Hex color and shows the result as you type. The same input always gives the same answer — refresh the page and you will see exactly the same figure.
Formula used
Color Blindness Simulator is computed by the formula below, using the inputs you provide.
Inputs used: Hex color.
Worked example
Take the default example — hex color of #3b82f6:
- list: Protanopia (red-blind): #5a5ada, Deuteranopia (green-blind): #5650d3, Tritanopia (blue-blind): #3fc4bf
Frequently asked questions
- Is the Color Blindness Simulator free?
- Yes. There is no signup, no usage limit and no watermark — the checker runs entirely in your browser.
- Does the Color Blindness Simulator store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.
- What inputs does the Color Blindness Simulator need?
- Hex color. Change any of them and the result updates instantly.