I think I've been stupid :bang:, I finally found the colour codes inside my manual, it would have made sense if Fiat had indexed them but the manual for the Fiat is pretty rubbish.
Anyway, for future reference and if anyone needs their code:
Colour-----------Fiat Code---- Code
Banquise White----249---------P0WP
Imperial Blue------455---------P04P
Quartz Grey------685----------M0ZR
Aster Grey-------667----------M0YJ
Royal Blue-------424-----------M02M
Hurricane Blue----722----------M0GE
Blue Lake--------453----------M04F
Intensive Green--352----------M06M
Breeze Green----325----------M08Q
Renaissance Red-103----------M01E
If this helps anyone not feel stupid in the future I have done my job.
Damien