I am sure somebody will answer, but remember you can search the forum, tick archive and you will see a lot of answers to your question. Here is an example.
I just finished the bezels for my car. I mixed Revell 36 & Revell 84, approx 1/3 of 36 and 2/3 of 84, up to your own taste. I used the backside of the ring around the horn button to compare the colour to. And finished it with a layer of satin clear coat. I like the colour in combination with the bakelite. Probably not original, but which colour is?