I second/third that! bright an carnivally!
I googled carnival colours and wow were they bright!
How about...
A badmoon/golden yellow for the wood/structure up the back. With a blood red for the line running up the centre.
With the explosion at the top done in the classic, Red orange, yellow incrementing flames...ahh you only have 2 parts to the flames (thought i saw 3).
OOOOO! you could..... do the other clasic... the fade like on a power bar. starting yellow at the bottom of the structure fading into a deep red for the top. Or the green up 2/3 then a little yellow/orange into a finish of red at the top of the structure, flames bursting out.