The dark theme changes the default bright background color in the new Microsoft Edge to a darker color, which is easier on the eyes in low-light environments or if you prefer less bright interfaces.
Here's how to activate dark mode:
Go to Settings and more > Settings .
Select Appearance from the Settings list.
Under Customize browser > Theme, use the drop-down list to select Dark.
Note: This topic is for the new Microsoft Edge . Get help for the legacy version of Microsoft Edge.