This was brought up before.
For the umpteen time it is Caterpillar Fleet Yellow..... I will try to locate the web history on it...
This 1970 'Cuda convertible was one of 64 built for sale in Canada with the 340 and automatic. This car was found by Don Johnson in Canada and converted to a 1971 'Cuda 340 with a 4-speed manual. This was the 3rd car to be converted for the TV show Nash Bridges. For the show, the car was painted Lemon Twist Yellow. However, after shooting the pilot for the show, producers were concerned the yellow may not show up on screen properly. After looking through several yellows, the final color became Caterpillar Fleet Yellow. Once the show left the air, Don Johnson purchased the car for his personal use until he sold it at Barrett-Jackson in 2003. From the Brett Torino Collection.