Lee,
I had the same problem with my car, 1490, May 1971. The Marti report stated that my car was one of 87 cars painted "Grabber Blue". The only blue listed in the De Tomaso 1971 paint chart is called "Medium Blue", paint code V406.
1490 was originally painted "Lime" (V307). The lime green is everywhere.
I called Kevin Matri and told him that the report was not correct. He asked me what was the correct color of the car. At that moment, I had to make a split second decision. If I told him "you tell me", he would probably just say Grabber Blue. If I told him "Lime", I would probably receive a "corrected" report showing Lime as the color. I received a "corrected" report. 
John