If you have a call to action (definition– call to action is an interface that encourages visitors to take the next step, like add to cart button or signup for newsletter box) that has a high conversion rate (meaning visitors that interact with it convert at a rate much higher than site average) do more to make it super visible. Assuming your objective is to drive more usage from search box (a call to action) this is a great treatment on gardenoflife.com–
I like it for two reasons–
1: Showing a person’s face makes the search box more visible.
2: Her shoulder cuts the left corner of search box. This asymmetry makes the search box more visible.