This extension simulates the website as a color vision impaired person would see.
Colorbldingin can simulate:
Red-Blind / Protanopia
Green-Blind / Deuteranopia
Blue-Blind / Tritanopia
Red-Weak / Protanomaly
Green-Weak / Deuteranomaly
Blue-Weak / Tritanomaly
Monochromacy / Achromatopsia
Blue Cone Monochromacy
Additionally, it’s an open-source project hosted at https://github.com/LeonardoCardoso/Colorblinding
For more information, visit http://lab.leocardz.com/colorblinding