DVT SystemVerilog IDE User Guide
Rev. 19.1.40, 13 November 2019
If you want to change the color for all the editors and the interface you can use the Themes feature. Go to Window > Preferences, then navigate to DVT > Themes and select a predefined theme or import a theme file (either old DVT themes or ECT themes).
You can keep the interface in sync with the background color of the editor, from the same preference page.
After applying a theme a restart is required.
Keep in mind that applying a theme will overwrite the color preferences for the selected editors.