yes, yellow on black would probably totally spoil the look .. if I 
think back to the eighties, the Amiga used white, black and orange on 
dark blue to achieve best readability on TV screens. Although, this 
might still be true, this would probably look terrible today :-)

I'll think about more solutions, though. Feel free to drop me a note 
if it remains unreadable with the next two releases.

Best regards, 
Felix