The difference in color was caused by the 
artificial lighting when photographed 

Base color is Silver Pearl Metallic up front, blending to a Black Metallic Pearl to the end of rear fender

Blend is also carried to frame to match tank and fender fade

Flames are done in a Coarse Silver Pearl Metallic, 
then shifting to a Coarse Dark Silver Pearl Metallic as the flames go to the back of the bike

Flames are then given 3-D effects with a transparent Black Drop Shadow

Pinstripping is done in Gray.