About RGBlind

Here's a fact that surprises most people: about 1 in 12 men and 1 in 200 women have some form of color vision deficiency. That's a huge number of people experiencing the web in ways designers never anticipated.

We're here to close that gap. Our tools give designers and developers the clarity they need to understand exactly how their work appears to users with different color perception—no guesswork, just accurate, science-backed simulations.

Good accessibility shouldn't be complicated or expensive. That's why everything here is free, straightforward, and built to fit naturally into your existing workflow.

RGBlind uses the color vision deficiency simulation matrices developed by Machado, Oliveira, and Fernandes in their 2009 research paper "A Physiologically-based Model for Simulation of Color Vision Deficiency."

This approach provides the most accurate simulation available by modeling the actual physiological differences in color perception rather than using simplified approximations.

RGBlind started as a side project and grew into something we're genuinely proud of. We're designers and developers who got frustrated with the lack of good, free accessibility tools—so we built our own.

Whether you're double-checking a color palette before a client presentation, testing an interface for accessibility compliance, or teaching students about inclusive design, we've got you covered.