Definitely the Indian River. Your material selections sound similar to mine, and at least from my monitor, Indian River looks similar to my color (though that's not what mine is). I'm very pleased with the combination. This doesn't show the colors the best, but there's a serious shortage of natural daylight in my bathroom (it doesn't have any exterior walls).

We found that the Shitake really changed tone depending upon what it was surrounded by. I would suggest painting a large sample board and moving from place to place in your light and against your other materials. I found choosing paint colors the hardest part of building our home. You have to have a large sample and take to the actual place you want to paint it to see the light because it changes depending on where you are.

Combining emerald green and gray is tricky, and then it also appears you have beige carpet, golden beige shades and yellows in the rug. I think you can make the rooms work if you paint all the walls a neutral white - White Dove was a good suggestion. First, remove all your extra colored pillows and the rug so you are looking at the room with just the two main colors you need to coordinate with (the sofas). Put your extra green pillows on the gray sofa. Maybe you can use your gray/yellow rug under the dining table instead. I would replace the mirror on the dining room wall with large artwork that brings in the deep greens of the sofa to help coordinate the rooms.

I think a pale tan with white trim and columns would look good with black shutters and red brick. I would remove any planting from in front of the proch, except annuals and perennials, to open it up. Add more flowering bushes and ornamental trees. You have a lovely house and setting.