Late 70's Porsche 928 paint and interior options were fantastic!
Vibrant single-stage solid colors like Continental Orange or Talbot Yellow were available, and a broader range of metallics like Minerva Blue or Tobacco Brown began to popularize. And fabrics such as the avant-garde Pasha or classic Pinstripe velour were also in fashion.
Included here are both 1978 and 1979 color and interior charts, showing available paint colors and interior materials.
To search further on color codes, check out the Rennbow database.