DVT SystemVerilog IDE User Guide
Rev. 19.1.12, 19 April 2019
If you want to change the color for all the editors and the interface you can use the DVT Themes feature. Go to Window > Preferences, then navigate to DVT > DVT Theme and select a predefined theme or import a theme file.
To use dark colors you can select the Dark predefined theme.
After applying a theme a restart is required.
This theme will apply on the selected edtitors and also to GTK if you're using Linux or Solaris distributions. Keep in mind that applying a theme will overwrite the color preferences for the selected editors.