If Federer says it is, than it is!
What color is a tennis ball? Fun article from the BBC.
"For some people Federer's word was enough, with one person suggesting "if Roger says they're yellow, they're yellow", and another saying "I've always thought tennis balls were green, but if Roger Federer says they are yellow who am I to argue"."
My answer? It's all about perception, and my job is to control that perception in a unique, creative way, because every project is different.