Thank you for this course it was helpful on many level. First time ever with this medium so to try it I build a little palette of 5 color and did a color wheel.  Really glad of my color choice so far. I don't know if i will need more opacity will see! 

I was a bit torn with my earth tone I usually use mostly burnt umber in a limited palette or burnt sienna. Almost never raw umber. Van dyke brown was also intereresting, but after a quick research I saw it was a more slow drying pigment so I finally took Raw umber because hey... I just add a bit of red and I can get a burnt...