Interesting story behind this:
In DirectX 9, if you want to use true type fonts, you need to use white on black because they are anti-aliased to a back blackground anyway. This is the reason our fonts in WOM looked so terrible. We had to come up with all kinds of work arounds for the crummy font handling of DirectX 9.
DirectX 11 fiixes the font stuff but since FE is a DirectX 9 game, we decided it would be better to pick our battles.
So now you know why every DirectX 9 supported game has light text on black background.