Hi mhcannon

Those colours you refer to in the preferences rollout do not seem to include the user interface background.

The following is shown in 'Help':

To open the color editor
Choose Window > Settings/Preferences > Colors.
The three tabs control different color uses and work slightly differently:
The General tab lets you change user interface and view panel colors, including the view background color.
The Active and Inactive tabs let you change the colors of selected and unselected objects and components.
To change a color on the General tab
Click the arrow next to a section heading to show the colors inside.
Double-click a color swatch to edit it or drag the slider next to a color to change its brightness.

Note that it says "The General tab lets you change user interface ... colors, ...". I cannot see under preferences how to do that. Can anyone shed some more light on this?