Moss green, like in the paintings and the chairs.

I think your bench would look better on the other wall, under the pictures.

Multi colored pillows to pick up colors in your room. My pics won't post.

Needs something bright and snappy (a red or dark rose like in the book cover on coffee table?) along with a print that ties in existing colors.

Looks so much better. When you tire of red, you can change it up with another color.

they say that to make something feel like a part of the design you should have 3 in this case of red. it is also nice to reference to the chairs from the couch and vise versa. I would place 2 lumbars along the arm of the couch, and one on each chair. they would refer to each other, the red, and most other colors in the room

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The red is too much of a contrast. I agree with the first poster - a soft, moss or sage green. These are from Pottery Barn

Deep greens and blues to look more natural and highlight your beautiful artwork.

if you do not like the birds let me know i will be happy to dump and save room, I like the other colors better too. but it is your couch. be happy to try those too, if you pick one. others are pretty but often i can come close on my <$25 ones.

The red isn't working - you need the accent color in 3 places to work. Use a color from the art