Emulate vision deficiencies

To better meet the needs of your users with color vision deficiency (color blindness), Microsoft Edge DevTools enable you to simulate specific color vision deficiencies. The Emulate vision deficiencies tool simulates the following categories.

Color vision deficiency Details
Blurred vision The user has difficulty focusing on fine details.
Protanopia The user is unable to perceive any red light.
Deuteranopia The user is unable to perceive any green light.
Tritanopia The user is unable to perceive any blue light.
Achromatopsia The user is unable to perceive any color, which reduces all color to a shade of grey.

To simulate a vision deficiency being applied for your web product, open the Rendering Tools.

  1. Open the Rendering Tools by selecting the ... menu item in the toolbar

  2. Select More tools

  3. Select Rendering

    Opening the Rendering Tools

The Rendering menu appears in the drawer.

  1. Scroll down to the Emulate vision deficiencies menu item and select the drop-down menu to display the options.

    The Emulate Vision Deficiencies menu on the Rendering drawer

  2. Choose an option.

    The Emulate Vision Deficiencies menu options

  3. The main windows displays the simulation of your selected option applied to the current page.

Use the Command Menu

You may also use Command Menu to access the different simulations.

  1. Press Control+Shift+P (Windows) or Command+Shift+P (macOS) to open the Command Menu.

    The Command Menu

  2. Type emulate, choose what you want to simulate and press Enter.

    The different simulation options available in the Command Menu

Important

The Emulate vision deficiencies tools simulate approximations of how a person with each deficiency may see your product. Each person is different, therefore vision deficiencies vary in severity from person to person. To better meet the needs of your users, avoid any color combination that may be an issue. The Emulate vision deficiencies tools are not a full accessibility assessment of your product. Instead, the Emulate vision deficiencies tools should give you a good first step to avoid problems.