Comment 4 for bug 607821

OK, according to the spec, when there are no matching results:

 - the background colour of the search field should change to red
 - the dash should show the text "No results found."
 - a button should lead the user to "Search the web".

I'll attach the relevant wireframe to the bug. If you don't have a pixel
perfect rendering of the red background, just go ahead with the colour
used for the close button on Ambience, and we'll get a pixel-perfect
iteration from Otto for Natty.