In my oppinion all Mk.IX (ZX- from 0 to 10) from Skalskis Circus (or C flight of 145 sqn, or Polish Combat Team) have blue color with white edges.
Bigger discrepancy is description of camuflage paint. ZX-1 and 4 has Desert Scheme painting but some sources suggests ZX-6 has Temperate Scheme paiting beacause on b/w photos is darker than other Mk.IX.
http://pspbis.fm.interia.pl/cs.htm