Why is the color "brightness" so high or look muted for the Layer Painter in Terrain?

When I painted on the grass layer “Terrain Layer” Tutorial it was the correct shade of green. It only became like this after I started adding decals onto the interior walls of my level. The RGB are still at the same values, brightness and opacity never changed so what happened? Did I do something on accident that changed the tone of the grass layer?

EDIT: I tried saving and closing Lumberyard a few times and it still hasn’t changed.