(If it were me) I was on different project but started at local Sherwood Williams paint store and get a "color fan". Then see what color you want after you take color fan home in RV and look. Then back to Sherwood Williams. My local one has maybe 8 or 10 binders of vinyl wall paper that I was able to real close to what I wanted. Takes longer than I thought looking thru them. Then get on-line and many places to get what you need. But much hard to match up colors looking on-line.
Make sure your water damage is fixed first. And has dried out enough for something to stick.