Starting with Servoy 8.2 it is possible to switch themes with special dark icons support: 

Go to Window -> Preferences menu, then under General, on the Appearance page select the new theme, and click Apply.

 

In case a dark theme is selected, it is necessary to:

  1. configure the script editor with the dark theme
  2. set the "Use dark theme icons" preference on the Servoy Preferences page, then click OK.
    Please note that a restart is required after setting the "Use dark theme icons" preference.