I do not think you can have the pasteboard in any of the colors other than the theme colors.
You can change the theme from...
To make the pasteboard match to theme color, you need to right click on the pasteboard and choose the option from the drop down menu.
If you somehow feel these colors are not sufficient, you can file a feature request at Feature Request/Bug Report Form
Also, you can always change the preview colors. (preview= what comes when you press the "w" key when no object on your page is selected). You can change the preview colors from here
and my preview now looks like...
Let me know if this helps.