I promised at the demo that I would post a bit of notes on my blog so people didn't have to wright everything down & try to watch at the same time. So, hopefully this will help!
The colors I used for this painting are Indian Red, Yellow Ochre & Cerulean Blue to create a purplish mix and a separate yellowish mix. These three colors combine together to create what is called a Desert Triad and has a ton of possibility's depending on the amount of pigments used and the amount of water used.
I just discovered this mix and I think it will take me a long time to use all the possibilities from these colors! These colors are also used separately in the painting along with Burnt Sienna, Burnt Umber, French Ultramarine & Sepia. I created a dark brown mix using Burnt Umber, Sepia and French Ultramarine and also used a mix of French Ultramarine and Burnt Umber to give a nice rich cool black. I then built up the layers with these colors slowing varying the ratios to give more variety & texture.