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This add-on simulates colorblindness to help web site developers in creating more accessible web sites.
Since I'm not a colorblindness expert, the simulations might not be accurate. However, it seems OK when compared with other simulators.
4 types of colorblindness are simulated, and you can choose them using a dedicated drop-down in the Responsive Design tool.
To use it, go to 'Tools/Web Developer/Responsive Design View' and then select a filter.
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