filtering color for grays

Sharing 15 U2 icons this time because U2 is just awesome. :) Yes, I know I said I was going to post my anime batch next but then one of the icons has been stuck in an icontest for almost a month now, seeing that the maintainer haven't posted the winners- and I hate having a stray icon. I may just post the batch anyway and deal with the icon being disqualified. We'll see. :\

Preview:


( Get Stuck in a U2 Moment Here... )

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[x] Don't edit them in any way.
[x] Comments always appreciated.
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