three-way only working on one switch
A) It is best to start a new thread for your own particular situation.
B) There are NO specific color patterns for 3-way's. Typically red & white, or red & black are used as travelers.
C) Black does NOT always go to black.
D) Brown and orange??? Are you in the US? Does your house wiring run in conduit?
The ONLY way we can help is if you tell us what (all) wires are in the two switch boxes and the light fixture box.
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.