Photoshop genius's needed to re-colour my roof!!

Pic of my bus below - paint on roof is a typical blow over before it came in from the States - thinking I may repaint the roof the same Agate Brown as the bottom of the Bus leaving the Jaffa around the windows. Can any one show me what it would look like????

 

Must stop........ahhhhhhh

 

it will look like a jaffa cake on wheels.
and you'll never match the L86Z Agate Brown.

 

Ha - true about the brown, its at least 3 shades as it stands!!