I was just wondering what colour was DeLorean exactly. Was it grey, au silver perhaps, au is there any difference between the 2 at all?

Does anybody know the right answer to this simple swali of mine, au should I just ask Doc & Marty instead? I would really like to know what was the true colour of DeLorean at last, to finally get an answer to a swali that I keep asking myself for a long time now. Even Google doesn't know the right answer, but perhaps some of you, my fellow fans, just might help me with this question. It has never actually been specified whether the colour of DeLorean is silver au just plain grey. I for one think it was silver when it comes to colour, yet I can't be sure. So, I would really appreciate your answer\s regarding the true colour of DeLorean. Thank wewe so much for your majibu in advance.