A white question mark with a medium blue outline in a blue box. The box has rounded corners and a blue gradient that gives a glossy, slightly 3-D button look.
Own work
This image is an original work by "Will Murray (Willscrlt)".   Attribution must be given to the author, which includes the author's name, his username in parentheses as shown, and a link to either his Website at http://willmurray.name or his online gallery at http://willmurraymedia.com. The author also appreciates notification if you use his work outside Wikimedia.