Well this painting was a good application of all those grays that I practiced the other day. I really like paintings with lots of light/dark contrast like this. It is always a challenge to get the values right. There are only a couple small spots of colors without any gray in them here. It is quite something to start graying down, say a green for instance. As you put red into it to gray it on your pallet, your eye may tell you that it is no longer green. But when you put it onto your canvas your eye tells you that it is a green. Remember that this is only going to be true if you get the tone and value correct. Otherwise it will look like dreaded mud!
(These are those little lanterns that miners used to wear on their heads. They are pretty cool and practical. My husband has a nice collection of them)