In general there are personalities that find detail soothing, look at coders, their life is all about detail...I am like a coder that writes our their code manually...hahaha The yellow will disapear and be replaced with greens and straw yellow. When I mix colors on paper I start with the lightest, yellow and blue make green. So the grass starts out yellow and I had different shades of blue for testure and definition.
I am leaving the sky alone, I am tempted to add clouds but that would make everything too busy with all the other details.