isnt camoflage supposed to hide you, to make you look like a tree or bush or something? and the Greeks use blue?? when everthing is dry and yellow?? eh, am i missing something?

on the other hand, the greek army is still using flak, so... 
Army, Navy and Airforce have different types of camo.
Army has the typical brown+green/whatever camo, Airforce has the one in the pics BlackDog posted and Navy has... Jeans and a shirt. Really.
But those are non-combat uniforms anyway. Incase of war or anything like that, everyone wears the Army-Camo one. (brown,green), apart from some Airforce (ground)units which still use the dark blue + green one, cause its a night-forest-camo in actual warfare for A/A operators in the wild. (See the pattern?).
On a side note, the flag gun BlackDog mentioned (Rheinmetal 20mm flak gun) is the only weapon so far in modern history that has downed a U.S.A. stealth bomber (during the war in Serbia a few years ago), because.. it's not 100% dependant on radar. (Basically its 0% dependant on radar, but with radar coordination it gets better).
Also, its the only A/A gun that Military lets us non-perma-military people use (aka those who do the 1-year mandatory army-service like blackdog, SoSp, me and every other male -almost- in Greece) cause its the oldest and cheapest one around

(5k Euros per piece, ammo included for a full spree). The Patriots, Tor-M1's, SU-300s' and other *expensive* goodies are only for Junior Officers and Officers to operate (and i always wanted to fire an SU-300!!)

Below are pics of the flak gun Blackdog was talking about(that one is my personal baby after spending like 30 minutes to deploy her on the field and then we realized we didnt load her up

), and a pic of how Blackdog will look like more or less when he's near to end his time in the Airforce (well, he wont look as cool and hot as i do, but at least the uniform + badges

)
Oh and what Pluto says is a fact. Camo makes so little difference nowadays.. Unless if you're like a big, wealthy, high-tech country/army fighting some kids in dirt with slings and then you boast about it *coughUSA*coughVietnam*cough*Iraq*cough*Afghanistan*coughEtc*.
When a modern army comes vs another modern army, those armies never meet. The one with the strongest AirForce wins without setting a single boot of troops on the hostile territory (most recent example NATO vs Serbia. Not one soldier ever set foot on Serbia during the war. Ever. Cause they'd be slaughtered like lambs and everyone knew it. They would win, but the oil rigs and plutonium deposits werent good enough reason to justify hundreds of thousands dead troops.) So, one side plays dead, while the other spends trillions in bombing wooden tanks out in the open and the winners live happily ever after on TV shows and CNN.
Oh, and they lose a Stealth (to an upgraded WWII flak gun,latest high-tech upgrade was during the 70's) during that aswell, meaning no sales to occure at any abrupt prices ever and also the biggest moral victory in modern warfare that a ''defeated'', overwhelmed army/nation has to boast about. hundreds thousands wooden tanks for a Stealth bomber. Fair nuff
