Originally Posted by
nizzon Strangely enough only for the inbox-view. Messageview and typing is still in white for some odd reason.
It's because email is typically formatted using HTML, which has color information embedded (either inline, or using CSS). Changing the background to black would result in things like black text on a black background.
Sure, they could detect black text and change it to white, but it quickly gets complicated with colors that are dark or almost black and especially once background colors or images are considered. The development/benefit trade-off just isn't worth it.