Hi Leslie! Do you have photos of or links to the swatches you're considering? And are there other items in the room you are committed to keeping (chairs, draperies, etc.)?

There are over 40 choices you need to give us more info to narrow it down

Pick a fabric that speaks to you that works with your carpet. Repaint your walls if needed. Don't make something as temporary and as replaceable as paint carry so much weight.

So you picked the wall colour, but the carpet colour is what the house came with? Or did you pick both? I'm asking because if you picked both, you probably like gray and beige together (a combo I like), but you'll want to bring them together, if not in the upholstery fabric, then in throw pillows and/or draperies. Like you, I would be inclined to keep the sofa upholstery pretty plain so you can add pattern with smaller elements. But that's just my personal preference for simplicity. How will the velvet wear? Velvets don't always go the distance, but I don't know enough about that particular product to know if it's pretty sturdy. Also, your walls and carpet are both fairly light, so you may want to go a bit darker for the sofa fabric, especially if you want a more formal look.

First, change the carpet, or change the wall color. Yikes. Not every room is destined for gray. Especially with builder beige carpet.

Leslie, this blog has some inspiration photos for mixing beige and gray:

https://www.beautifulhabitat.com/mixing-brown-black-beige-gray-in-design-decor/

Here is a slipcovered sectional in the Everyday Velvet Buckwheat. We've had it about 4 years and it has held up extremely well. I've spot cleaned with a damp cloth and also with a Tide stain pen and the stain just disappears. You can also machine wash. I would definitely purchase this fabric again.

I really like your selections!

Leslie, I understand the $$$ issue of replacing a houseful of new carpeting...I'm guessing you may do something different down the road, but in the meantime, I'd go with the darker upholstery on the left for the sofa and perhaps a print that combines the gray and beige for the chair, or maybe even an accent colour, rather than the light gray. And then find some throw cushions and accessories that have all three colours in them. What are you doing with draperies?

You could also have some accessories that mix matte gold and silver in one piece. Personally, I would not spend the money on an area rug over your wall-to-wall...I would opt to spend that money on draperies or other details that unite the colours. Your wood floors are really nice btw.

Leslie- I think the dark color looks good with the wall color and your rug. You could get a smaller accent rug to just put under your coffee table, glass hopefully -to tie in colors along with drapes and pillows. W/W carpet doesn't last long then you can get something different.

Everyday velvet wears well. I have 2 sofas in buckwheat, they look brand new. Spills wipe off easily with a damp cloth.