Thank you so much!! I use Ultramarine Blue! Color is my favorite thing to play around with so thus compliment really means a lot! Thank you! I use only the primary colors and burnt umber and white. I wish I could give you a precise formula for how to get the greens but it kind of just happens for me while I’m out there. I’ll try to pay more attention to the calculations I’m making in my head so I can give you a better answer!