ThemedPageBGColor
                                        No default value.
Add this property to the [System] section of your Settings.Dynamic file to set the background color for the following pages:
- Page Menu Page
 - Site Details Page
 - Site List Page (with map)
 - Station Page
 
Define the color using hexadecimal aRGB
 A colour value, defined as four, two-digit hexadecimal values. Alpha - Red - Green - Blue. An Alpha value of FF is assumed if only the RGB values are provided. values, having the form <AARRGGBB> for alpha, red, green, blue. 
Example:
ThemedPageBGColor = <FFFFD30C>
You must include the angle brackets. (The example color was chosen to be unmistakable, if not desirable.)