30 amp shore power cord

Hello. I have a Class C Tioga and I've recently had to remove my generator and had to disconnect the shore power cord from the 30 amp receptacle. I took photos before I removed the wires from the receptacle, but I am a bit confused. The shore power cord has three wires, one white, one black, and the third a light blue wire. Can someone please confirm if I can safely assume that the white wire is the neutral, the black the power, and the blue wire the ground? The reason I ask is because the wires coming out of the generator are white (neutral), black (power) and green (ground), instead of blue. I believe I can safely join the blue and the green wires, correct?