I got the Sunburst Yellow(by suggestion) and painted the rotator cap with it.
Putting that next to the timer cabinet they are completely different.
When I was stripping the rotator box and on the compressor box, the darker "Mustard" color is very visible. So I would think that's the original color.
Two-tone is my favorite, I think that only lasted about 2 years of federal signal painting probably due to the complex stripes. Another thing that federal had for about 2 years was the small lightning bolt logo on the projector horn.