I agree, that is very confusing. You'll need to contact the marketplace seller for info.
Contact Blue Nile Mills
Address: 380 Mill Road Edison, NJ 08817 US
This is a six piece towel set in Nomad, you'll see the correct color when you add it to cart: kmart.com/colormate-6-piece-bathroom-towel-set/p-096VA91540312P
(The blue color show is out of stock. The supplier has had issues with inventory due to the pandemic.)
Here's a 6 pc set in blue: sears.com/u-s-polo-assn-6-piece-bath-towel-set/p-A057359250?sellerId=SEARS
Hope this helps!