Use operating system accessibility features

Contribute supports the Windows operating system high-contrast setting. You activate this setting through the Windows Control Panel.

When high contrast is on, Contribute responds as follows:

• Dialog boxes and panels use system color settings.

  For example, if you set the color to White On Black, all Contribute dialog boxes and panels appear with a white foreground color and black background.

• The Contribute editor uses the background and text colors you set in Format > Page Properties so that your pages render colors as a website visitor’s browser renders them.

 community help (adobe.com)