What Color Blindness Simulator does
Preview approximate color-vision transformations for design review. The tool keeps the operation focused and creates a separate result so the original remains available for comparison.
Color Blindness Simulator processes the supplied input in the browser unless its interface explicitly identifies a browser-managed service.
How to use Color Blindness Simulator
For a predictable Color Blindness Simulator result, keep the source available, test the smallest useful example first, and confirm the downloaded or displayed output independently.
- Enter or select the source colors, typography, dimensions, or CSS values used by the real design.
- Adjust one option at a time while watching the preview and the generated values.
- Copy the result into a representative component that includes realistic content and interactive states.
- Review contrast, responsiveness, browser behavior, and design-token compatibility before committing the change.
Where Color Blindness Simulator fits
Use this design workflow to create values that can be tested in a real interface, stylesheet, or brand system. Copy the output into representative components and review normal, hover, focus, disabled, light, dark, and responsive states before treating it as production-ready.
What to check
Check the actual foreground, background, text size, state, and surrounding interface. A simulation or threshold is one accessibility signal, not a complete usability test.
Test copied CSS in the real design system and review contrast at each text size and state. Simulations and numeric thresholds are useful checks, but they do not replace testing with people and assistive technology.
Privacy and limitations
Color and CSS generation runs entirely in the browser.
Generated CSS and color calculations cannot account for every display, browser, font, surrounding color, visual condition, or design-system rule. Accessibility thresholds and simulations are useful checks, not guarantees that a finished experience is understandable or usable.