I like how http://www.krop.com has input fields with a distinct color and call to action at the same time. The "Live" really calls out the Instant nature of their filtered search.
I don't know of any metrics that show % increase or decrease in usability. Regarding color, i am under the impression that most users are used to and prefer the default input box setting with their browser, and may assume that colored or redesigned input boxes provide unique experience. But check out Tumblr.com for their super big input custom designed input fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Posted from the new ixda.org http://www.ixda.org/discuss?post=48953 ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... disc...@ixda.org Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help