Its McLaren Orange!!! If you were a fan of the Can Am series McLaren had won the championship I think four years in a row starting in 1967 or 68...I personally think that color was picked to piggy back on those successes (I had one of their Can Am cars so I'm a huge McLaren fan so that is just my bias, but there may be some truth behind it). I'll post some McLaren team car pics.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.