My house is blue and green year-round, I think it just looks fresh and not seasonal. Maybe adding seasonal elements to the other decore to change out would help?

I absolutely agree with the general statements. Your room is looking very nice and your furniture choices and colors are lovely. However, right now the room looks a little sparse because the only pattern is the rug and most of the furniture appears to have the same texture. Additionally, the placement of the furniture in relation to the rug is a little uneven. I would agree that the sofa and coffee table should be centered on the rug. The chairs could hopefully be pulled forward to have at least the front feet on the rug. (I'd probably try to get both brown and blue chairs partially on the rug, evenly spaced.) The blue chairs don't have to be pushed back into the nook, but could come forward some. I love maggiepie's mockup. I think the patterned and textured pillows really help. As does having something decorative (like a tray) on the coffee table. I would suggest stopping by some nearby home decor stores (Target, BB&B, Home Goods, Pottery Barn, Crate & Barrel, etc) to see if you can find any patterned pillows that you like, or some accessories like floor lamp(s), table decor, etc. I personally would not rush to buy furniture like side tables or book cases unless you already had one in mind. If you don't have the time, just get things centered on the rug and you're really almost there. Your colors already look great together.

The carpet is actually a pretty warm gray and I love the color of the walls. I would definitely go with a Scandinavian style two-tone bedroom. No colors needed and it’s so calming. Do black in white pictures with oversized white mattes, a simple bedframe and linen sheets. Wood side table with a black metal lamp. Maybe a white fur throw rug.

Everything in this room is gray and I notice you're even considering a gray painting! The coffee table that you have is not bad although I would choose a square or rectangle. The "gray everything" trend is long over and thankfully color is back. Try lemon yellow or gold pillows on the couch as a starter, find a large and colorful piece of art to go over the couch, and add some large green plants in the living or dining area. Books would also add color and personality.