Primer Grey. 

It was orginally red, that painted brown.  When I pulled the breaker strips I had red up to the top door hinge and than white top.  I suppose that was the original color? 
I guess I was more interested what other would prefer as far as paint or if there was any reason why they cam solid white. 
 For Example:  The white was earlier model colors, or red was later or just to different colors options at the same time having no significance ...