DVT SystemVerilog IDE User Guide
Rev. 19.1.13, 25 April 2019
If you are using the linux distribution of DVT you can change these colors by going to Window > Preferences, then navigate to DVT > GTK Theme. This will overwrite the GTK theme of your system just for DVT when you start it using a distribution script.
After applying a theme a restart is required.
For Windows and MacOS users it is not possible to define an application theme, so the only workaround is to change your system theme to the desired colors.