paint mixing

I needed some gray paint. It was late, which of course for me is par. As in, stores are closed. So, armed with some leftover light blue, some sage green and some goldish color paint, with a dash of red and a hint of black thrown in for good measure, like a mad scientist I concocted what turned out to be a lovely shade of gray.  Actually ended up with two gallons total. Ha. Take that, Home Depot. I just saved myself fifty bucks. Said paint is for my current project, the (W)rec(K)room.  Will be posting pics when I finish the walls, intended to look like weathered concrete.