I love that first one!

This piece would brighten your space up.

A large piece of Art can really bring in a wave of deftness to your room. It acts as a style to your room.

Here's some suggestion for your wall you might like......to know more about my Art work and collections please visit my shop on Etsy website -

https://www.etsy.com/shop/PooArtGallery

The first image is great and ticks off all your boxes for color and modernity. Do make sure, if you want to get it, that it's the right size piece of art for your mantel. Scroll down on this link to see how to get the right SIZE piece of art for a mantel:

http://www.barrydonovan.com/blog/selecting-right-size-print-space/

Here's an image that shows beautiful styling of a mantel with a painting--taller pieces at the ends, shorter near the painting and in colors from the painting:

Here are two suggestions from Horchow.

Art, but no wider than the firebox opening.

The large piece of art is a great idea and some of the suggested images would work very well.

The two recessed lights are creating hot spots high on your wall and I'm wondering if they have adjustable eyeballs. If you could aim them towards the baseboard, I think the light would "wash" the wall better. If they are not adjustable maybe you could change the bulb to a lower wattage or if they are spots change them to floods

They are adjustable. Great idea I never noticed

A few suggestions: The great thing about your room is that your color is only in pillows and drapes. This makes it easy to change it up completely on the color scheme if you are tired of the one you have. Start with some art that you like.

I also think lightening your drapes and changing your decorative pillows would help, and be quite affordable.

The images below are mantel designs of ours that might just help you through your dilemma.

If my post, I'd like all the info I could get - so, because I have about your color open for another houzzer, here's how paint company offers other colors - if you open link and scroll down: you have it already! brown, vanilla / the other direction greys.

Is your backsplash a slate color, or actual stone... just curious.

http://www.benjaminmoore.com/en-us/paint-color/raspberryblush