The outside wiring into our air conditioning unit became disconnected when we did the lawn. Do I connect the white wire to the white and the red and blue to the black?

I would pull off cover of inside unit. If to compressor unit, may find only a Pair of wires being used.

The outside wiring into our air conditioning unit became disconnected when we did the lawn. Do I connect the white wire to the white and the red and blue to the black?
Most techs will use the red and white wires for the contactor and the third wire is not used. Turn power off to A/C and furnace(so you don't blow a transformer or fuse) Go white to white and red to black. Turn power back on and see if it works. If the two wires outside was shorted together it's a good chance the transformer or fuse was blown.