Do I have the correct bucket seats? 1971 Demon 340

My understanding is the Demon 340 should have black/charcoal. My 71 Demon 340 has 1 of each front seats and the black/charcoal rear seat. It was a misbuild as originally built. I've had the car since 84 and got it from the original owner who had never changed seat covers. The 3rd original broadcast sheet was even still intact (rough shape) under the incorrect black/black front seat!