thanks for the comments guys, Army is organised using Warhammer Great War Rules, though its still a bit short of the 1000 pt mark, I need a 3rd platoon in my 2nd Company which will take the 'Army' to about 860 pts but with some smoke barrages etc I could probably make it to 1000.
The light blue I vallejo Blue Grey number 70943, I used it on my french as well

, but I think it works for AH Hecht Grau (Pike Grey) quite well to.
My Battalion also has a slight family connection as I've painted them up as the 40th IR 'Ritter von Pino' which was recruited from the same city in Poland my wife comes from. Though because of the large number of regiments in the AH army with very similar collar patch colours and button combinations I can at a push use them as 4 different regiments, 2 'German' and 2 'Hungarian' because by this point the distinction in uniform between the 2 had gone. I've listed them below:
IR No.4 'Hoch-und Deutschmeister' - Sky Blue Collar patch Gold Buttons
IR No.32 'Kaiserin u. Konigin Maria Theresia' - Sky Blue Collar patch Gold Buttons
IR N.40 'Ritter von Pino' - Light Blue Collar patch Gold Buttons
IR N.72 'Freiherr von David'- Light Blue Collar patch Gold buttons