Audi A4 B5 doors

Hi everyone! I am new here and to the cars too. I need to change my audi A4 B5 1996 doors and i was looking through the internet and found out about the B5 platform on the VW Passat. My question is if i can fit a VW passat door into my audi? Do the years have to be the same for the passat if it is even possible? How about other audi b5 doors? Do they have to be the same production year too? The car color is dark green, so it is a big problem to find the right color doors from same audi a4 , but it is much easier for VW. Also the car has some idle rmp problem. Maybe it's a common problem? Sorry for the noob questions.

Best regards,
Alex

Alex, the b5 platform only really refers to the floorpan or platform which the rest of the car is stuck to.
The A4 and Passat are as different elsewhere as a car and a train or a scooter
Good luck