How to question

In between the 2 front seats and on the doors is like this fabric, its kinda gray now and really worn down. I hope everyone knows what im talking about here. Im about to paint my interior all blue and black and i have to do something about this fabric. What can i do??
Also changing the seat colors? Can it be done and how much?
Not to leather just recovered maybe in a black or black and blue, something to match the interior?
Thnx everyone