Getting more colorful

Whiling filling colors for the background hill, I started questioning myself about the colors of the hill. The reference photo is showing too bluish colors. To make up my mind, I went to Wenatchee last weekend to see actual colors. Since the season is spring, instead of autumn, the hill was more greenish with short grass. But it was mainly yellow-brownish. My on-site painting was likely more closer to the actual colors.
I started putting light yellows for the poplars just to see the balance of the colors. I need to put some more colors on the water to see the balance well.