The classic Control Panel app can be used to enable or disable High Contrast. Turn on High Contrast Mode with Control Panel Press the left Shift + left Alt + PrtScn keys together to toggle High Contrast on and off. Tip: There is a hotkey in Windows 10 that you can use to quickly enable High Contrast. In the drop down list Choose a theme, you can select the following themes: High Contrast #1, High Contrast #2, High Contrast Black, High Contrast White.On the right, turn on the option Turn on high contrast located under the section Use high contrast.
Turn on High Contrast Mode with Control Panel Enable High Contrast Mode in Windows 10