Iconic vitality: Yellow Green or Green Yellow? The fresh green shade Greenyellow stands for joie de vivre and can also be perceived as harsh at first glance due to its colour presence. The lime green colour was formerly called 'Yellowgreen' and is firmly associated with Porsche history and with the 911 RSR, which caused a sensation at the International Race of Champions (IROC) in 1974. Greenyellow is a mixture of green and yellow that is often associated with nature, freshness and spring. Depending on the lighting and the viewer, the paint may appear to have more green or more yellow. The best twelve drivers in the world from Formula 1, NASCAR, Indy 500, Can-Am, Stock Car and Le Mans were set to compete against each other in the first season of the IROC in brightly painted Porsche 911 RS 3.0 models. These would prove to be eye-catchers not only due to the emergence of the colour television. The Carrera RSR #10 Petty in Greenyellow is one of only 15 differently painted examples that Porsche built for the 1973 IROC.