But do you like the color against your skin?
If so, then all is well-- but if you wanted a darker gold strand, then maybe you'll want to send it back and buy a 24K strand.
I also tend to think that since there are just 4 broad categories (14K, 18K, 22K, 24K) but pearl color actually exists along a continuous spectrum, it's matter of judgment on the part of the vendor as to which category to assign any given strand to. I imagine there are lighter and darker strands in each category.