Portrait on blue paper

This week in my figure painting class I decided to try something new. I had a sheet of blue paper (I think it was Strathmore), that I stretched on a sheet of masonite board. I then transferred my charcoal sketch from last week onto the paper. All this prep work was done before class. Once in class, the same model was there in the same pose, so I could use both her and my charcoal sketch for reference. I painted this with acrylics in about two hours, concentrating on trying to stay somewhat loose while getting some good, solid colors done. It was a fun thing to try, and I definitely want to try painting like this again. The final image measures approximately 13.5" x 19.5".