Click … Window > Styles to open the Styles Browser
There, click the Create New Style button and proceed to set things to your liking.
Notice in the Styles Face Panel you can set the default face materials to any colors (front & back) you wish.
Give your new style a name and click on the style thumbnail to save your changes.
Click … Window > Model Info to open the Model Info Dialog
There, you can to configure a number of different settings like units and text style specific to your needs.
When all is set the way you like; click File > Save as Template and tick the option Set as Default Template
Now when you open SU your settings load automatically.