Cubase 10: Color Schemes of older versions cannot be used
The graphical user interface of Cubase 10 has been thoroughly reworked.
Therefore, unfortunately, Cubase 10 cannot inherit Color Schemes and Custom Color settings made with previous Cubase versions on a system.
Cubase 10 will open with its default Color Scheme, which can be customized in Cubase's preferences (Windows: 'Edit' menu, macOS: 'Cubase' menu) under 'User Interface'.
Furthermore, Color Schemes saved as part of Preferences Presets or Profiles with previous Cubase versions cannot be restored in Cubase 10.