Marble flames, please help :)

Hi, I have a 95 hilux (tacoma wher you guys are)

Its painted very similar green to this

http://www.users.bigpond.com/paintdoctor/vb.jpg

I am getting Silver flames down the side, and they will be marbelised, however what colour should the marbelised be? if you know what i mean?

or is anybody on here an airbursher and done marble?