Erika he’s painting it for she wants the trees in the back to be darker what should she do with her green paint?

To make the trees in the background darker, Erika can deepen her green paint by adding a dark color. Here are a couple of options she can consider:

1. Mix in a small amount of black paint: Adding a touch of black to the green paint will darken its color, making it appear darker and more suitable for the trees in the background.

2. Mix in a dark blue paint: Another option is to add a dark blue color to the green paint. This combination will create a deeper shade of green and help give the desired darker appearance to the trees.

Erika can experiment with these suggestions on a spare surface or a small section of the painting to determine the ratio of green paint to dark color that achieves the desired result. Adjusting the ratio or trying different combinations can help her find the perfect shade for the trees in the background.