titanium exhaust tips

I'm making a titanium CF exhaust for a project, what is the color order for the tip? I usually see blue and yellow, any others?

I asked the google oracle and it gave me images to study;)

http://www.capa.com.au/pics/exhaust_titanium_holden_sedan2_big.jpg

so basically a blue to red to yellow with the blue thicker and the other colors?..sounds easy enough...thanks.

blue to purple to red to orange to yellow. Blue is the domanent colour

sound easy, bit it isn't that easy to do in 1/24 :D

ive already made a decal to go around the tip