That depends on if you are using the new "Theme" b display or the old standard display. If using the new "Theme based display you just hover over the help icon (It looks like a little gear on the right hand side of your yahoo page when you are signed in.) a menu will appear and then select themes. Then in the resulting pop-up window you can choose any of the available background images to use. If you are using the old standard yahoo mail configuration There is really no setting for the background color in yahoo mail and you will have to choose the default background color in your browser and that depends on what browser you are using. If you let me know what browser you are using I can give you instructions on how to change the background color in most of the different browsers. Hope this helps.
Answers & Comments
That depends on if you are using the new "Theme" b display or the old standard display. If using the new "Theme based display you just hover over the help icon (It looks like a little gear on the right hand side of your yahoo page when you are signed in.) a menu will appear and then select themes. Then in the resulting pop-up window you can choose any of the available background images to use.
If you are using the old standard yahoo mail configuration There is really no setting for the background color in yahoo mail and you will have to choose the default background color in your browser and that depends on what browser you are using. If you let me know what browser you are using I can give you instructions on how to change the background color in most of the different browsers. Hope this helps.