Daniel from Romania

My name is Daniel Calene, I'm from Romania and I have Opel Rekord A 1964, 1700 cc engine, 86,566 km, it is the third owner Dean I want to grab a restore, I have many original pieces made in Germany. If you can help me I did not find anything about the original color of the plate identified under the hood, color code is X402.

Thank you for your understanding and I hope these pictures help
have a good day