Color tool / layer issue
I am working on an image with two cats, and on one of the cats the color tool works perfectly fine, but on the other cat (on a different layer), the color seems muted or something. Even black shows up as a light purply-brown color.
The image is set to normal mode, RBG, the tool is set to normal, 100% opacity, and BOTH layers are set to normal mode, full opacity....
So what am I missing? I filled in a base color on each cat-layer respectively, and the colors worked fine. Then I filled in the brown spots on one cat, went back to the other cat (always using correct layers), and wanted to fill in the spot-colors.... but now the color tool doesn't behave normally? I didn't change anything... But something is wrong x')
Anyone here knows what it might be?