User-95607119 posted
There is number of reasons why you don't see background color on your mobile device. Let's try to list the reasons:
*) the mobile device you are testing your page on, doesn't support background colors
*) device doesn't support bgcolor attribute
*) ASP.NET outputs markup without background color specified
Check out ASP.NET output for different devices. You may find OpenWave mobile simulator very useful tool for that. Just change the user-agent header to value that fits your device header and go on.