That's a whole page of funnies, now how about some ESB/ROTJ ideas?
Though I must own up to really liking the dark Death Stars, there is no reason why a new Death Star should look the same as the first one.
A dark Death Star firing a red beam would make it more like a Sith Weapon than a conventional military weapon, a rough idea of how that might look :
And the purple and indigo matches the Emperor's Throne Room interior.