Thanks, everyone, for the comments.
Mike, the paint is from the little Testor's bottles of acrylics. Their blue is quite dark, almost black, so I mixed in a little white.
I have used them almost exclusively for the past two years or so. They come in sets of about 9 colors. I wash out the empty bottles, save them, and then mix some colors a little more to my liking.
Needless to say, I have a zillion bottles of green on hand. lol
I actually do better with the brush paints than I did with the sprays.