Battleship grey went out of style a long time ago. It must be hard to do it otherwise You've seen Outlook 2013, correct? :)
(Yes, I saw your subsequent paragraph about VS 2012)
There was a great line at a recent SQL Saturday event. I was doing a session that compared SSAS OLAP vs SSAS Tabular. Someone asked me if there was any functional differences between SQL Server Data Tools for BI 2012 vs SSDT 2010. Before I could open my mouth, someone in the audience shouted out, "Yeah - in 2012 it's harder to tell if something is greyed out". I wish the folks who made that decision could have heard that line - priceless.