Blue And Brown Wires Positive And Negative. Blue is the negative wire. Older flex and premises wiring will use the following colors. Negative of a negative earthed circuit.
Positive of a positive earthed circuit. 3 wire earthed dc power system. Phase 1 red phase 2 white phase 3 dark blue neutral black earth green. Old australian colour code multiphase.
2 wire earthed dc power system.
If you do have a fixture using international standards the good news is that the matching is very easy. Phase 1 brown phase 2 black phase 3 grey neutral light blue earth green yellow. Note the reversal of the active and neutral wires depending on whether you are wiring a socket or a plug. Old australian colour code multiphase. Words alone are not a marking.