The first thing I think that you should do is remove those window treatments. The iron rods are appropriate with the stone but the shiny/silky damask with tassel trim is like wearing a prom dress on a hiking trip. The stone work has a choice of warm neutral colors to choose from to inspire your decorating plan for this room. What appears to be a large scale brown chair on the right looks like a good choice for the room because it has texture and the color compliments the stone. Instead of the white window trim I would use a stain color that is the same as the mantel and I would use something wider and heavier looking to compliment the large scale of the fireplace. If you want to stay with blinds choose a wood in the same color. Paint the walls a sage/moss green or rich caramel color and you would have the basics for a great looking room. Good luck!