Since about 2007 the PC-7 has an new overall black colour scheme. This scheme was first applied to Pilatus L-01 in 2004.
This colour scheme is chosen because of flight safety. Research has shown that a black silhouette shows a better visibility against the sky than the earlier colour scheme of yellow and red.

SchemeColour nameFS-numberBS-numberRALHumbrolXtraColorVallejo Model ColorVallejo Model Air
Standard #1: Delivery schemeOverall Yellow     1023 69 X108   71.002
parts Red     3020 174 X014 70.909  
parts White     9010 130      
New scheme from about 2004
Standard #2Overall Black     9005 33   70.950  
parts Yellow     1023 69 X108   71.002

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.

Pilatus PC-7-1-SMALL
Pilatus PC-7 in the delivery scheme
Pilatus PC-7-2-SMALL
Pilatus PC-7 in the second scheme of overall black, applied from about 2004 (at least Pilatus L-01 had this scheme applied) .
Pilatus PC-7-3-SMALL
Pilatus PC-7 in the current definitive scheme of overall black, somewhat different from the original second colour scheme.