My daughter just bought Interior Design and she went with the slip cover offered. You will love the fabric. She went with Camel, but her sofa looks darker than the sample you show.

I have had my sofa from ID for 10 years...still love it. The fact you can pick the styles, colors of the legs makes it seem so custom.

The sectional will have its back to the table/chairs. I think it is very important that the fabric works with the blue chairs. Consider: Spa

Or any of these colors:

Oasis

Your Camel

Celadon

mink looks like it would fit right in and is the same tone as your rugs, but only you can tell if they are the same tone in person. the camel would provide warmth and relaye to your light fixture and kitchen cabinets maybe. again, hard to tell. i do like the idea of spa, as it would be repeating your teal theme. So if the warm tones match, i would go camel. if not, then go spa. (i am giving this caveat because the camel almost looks like it has a greenish undertone compared to said light and cabinets, but only you can tell IRL.

There aren’t many sectional lovers on this website so you might not get many replies. Have you masking-taped off the size of your proposed sectional on the floor to make sure it will fit well?

For a very large piece of furniture, I’d tend to go with the lightest color choice.