6 wire installation

[MD78]

I have 6 wires from a honeywell thermostat

W- White

Y - Yellow

G- Green

O - Orange

R- Red

B-Blue

Where to i put them? Except for Green, none of them match up with the nest. 

Thanks

[CoolingWizard]

No thermostats can see wire colors.  

The White wire on W is for heat. It gets connected to Nest W1. 

The Yellow wire is for cooling. It connects to the Nest Y1.  
The Orange wire id for your heat pump changeovers valve. It gets attached to the Nest OB terminal. 
The Red wire is the 24VAC power. This gets connected to the Nest RC terminal. 
The Blue wire is your 24VAC power Common. This wire gets connected to the Nest C terminal. 

AC Cooling Wizard