Those part numbers are for the end gate (tailgate) transfer only, there are also part numbers for the "Sandman" fender decals as either a set of two or left and right, left and right fender stripes, left and right door stripes, left and right quarter panel stripes and petrol cap decal. I haven't found part numbers for the complete sets yet.

HZ
DY6 Purple - Plum - Dark Blue
DX5 Light Blue - Mid Blue - Dark Blue
DY4 White - Blue - Dark Blue

The last colour being the middle and most prominent colour. For some reason the new HZ decals are typed back to front in the parts manual and has caused some confusion with restorers...
There are cars out there with decal colours back to front on them like these two below........ however they look quite good..