Well, so much discussion over a hazy photo.

I've long ago learned not to put too much faith in anything photographic on the web - too many Photoshop experts out there (after all, how can all those mugshots in dnj's recent thread be such a handsome bunch? :-)).

Grey, the grey 'black' keys may be the result of reproducing a colour pic. in greyscale, or just 'screened back' for effect.