To the right muddy right area above the cat was disturbing before I brightened and lightened all adjacent areas and darkened the lower foreground.
No color by itself is muddy. If your intention is to make a pleasant mood there are a number of corrections possible. Think about the relationships of the picture as a whole. Mutilated colors can sing making other colors more beautiful when they transition to colors that are either significantly lighter or darker. They sing with complementary colors that are their opposites on the color wheel.