Yep, it was a weird color, kind of a bluish-green light grey. (Dare I say "Duck-egg"?)
I mix my own colors for the airbrush. I recommend that you get one. You will love it! It will change how you view painting forever.
Use the forum here, there are many pictures of completed builds to get an idea of colors and tone.
Never be afraid to ask for help, the guys are more than willing to share their knowledge.