Back in traditional media, here is some Gesture studies done in Charcoal.
Acrylic color Mixing, I think I got the right color there in the Edwards book, is amazing how important is quantity of each pigment at the time of combining them, bottom left is what I got when I over used orange and it turned again into orange, eating all yellow I have put on the mixing before.
Color Concept paintings, really fun to do and really quick!
