daunrealist, there is no need to specify which movie we are talking about. The old movie is called Willy Wonka and the Chocolate Factory, and the new one is called Charlie and the Chocolate Factory. Johnny Depp's eyes seem to be reflecting the colors around him. Why go through the trouble of giving him contacts if he doesn't use them the whole time?
Hate to contradict you but if your referring to the new version this is incorrect. There is one scene when Willy is in Loompa land where they do appear to be blue, this is easily explained by strange lighting and his brown eyes reflecting the blue of the guts of the bug he just killed. Anyways if they went to the trouble of changing Johnny's beautiful, naturally brown eyes to blue then it'd be obvious that they'd need a blue eyed child to play him. However That is the only scene I can see how you might think Willy's eyes are blue.
Of course the color on my monitor could be screwy, but I don't really think so.