Lucid
AccessibilityiOSLucid transforms your camera into a color vision tool, in real time, for everyone. Whether you are color blind, helping someone who is, or designing products that need to work for all users, Lucid helps you understand and correct how color looks to different people.
What it does
Color Correction Filters
Scientifically-based daltonization filters that boost contrast and shift colors so people with red-green or blue-yellow color blindness can see more clearly. Works live through your camera.
Color Blindness Simulation
See the world the way color blind people do. Lucid simulates protanopia, deuteranopia, tritanopia, and more. Perfect for designers and developers testing their work for accessibility.
Color Vision Screening Test
Take a quick informal screening test based on color perception plates. Identify potential red-green or blue-yellow color vision issues and get a recommended filter based on your results.
Features
Real-time GPU-accelerated filters
Color correction and simulation run live on your camera feed with no lag.
8+ filter modes
Covers correction and simulation for protanopia, deuteranopia, tritanopia, and more.
Built-in screening test
A quick informal test based on color perception plates. Get a recommended filter from your results.
20 languages
Localized for users around the world, so the app feels right wherever you are.
Fully offline
No account needed, no internet required. Everything runs on your device.
Live camera view
Point your camera at anything and see corrected or simulated colors instantly.
Who is Lucid for?
- •Color blind users who want to boost contrast and tell colors apart more easily
- •Designers and developers testing their work for color accessibility in real time
- •Medical and education professionals exploring color vision
- •Anyone curious about how different people see the world