Well it depends on what you're looking for with the window treatment. Personally I would go for roman shades. There are plenty of options for color, how much light comes in, and design. If you're keeping that brown accent wall definitely get something that correlates with it.

Hey. Regardless the style of blinds/shades you gonna opt for, you do need inside mount installation. You do NOT want to cover the beautiful trim around your windows which give your room this specific design.