They are the GTR colours Shane... The non GTR's had a few other colours...
R32 Colours:
KG1 Light grey
TG0 Dark grey
TH1 Dark blue
BJ0 Light blue
AH3 Red
KH6 Cream
326 White
732 Black
R33 Colours:
KL0 Metallic Shiny Silver
1N4 Light grey/silver
1N3 Dark Blue
AN0 Burgundy
KH3 Black
QM1 White
KH2 Dark Grey
DN0 Aqua Blue
BN6 Awesome blue
so DN0 = Aqua Blue, also known as Ice Green, also known as Burnham Green...
Apparently only 300 made in that colour...