Changing thermostat matching wires trouble

Question

Old thermostat:Protech
colors: brown, red, yellow, white, green, orange and blue.

New thermostat: 
Hunter
inputs: G,Rc,Rh (with opt. jumper), o,b,w,y

I need to know how to match them up exactly right.
I think Rc is red, g=green, 0=orange, w=white, 
y=yellow ???
Where does brown go?
Please  fix me!