Very nice rugs for the price. We prefer natural fibers so we liked these but there seems to be some discrepancy whether 100 wool or 8020 wool cotton but either is fine for us. 
Important to know for your color scheme there is blue yarn in the rug so there is definitely blue undertone but it works with our color scheme (as an aside, we’ve purchased two other “grey” rugs and one was moss green, the other was mint green! Yuck!). So this is more of what we think is a slate gray. They’re not perfect and they’re 
not expensive- so we think it’s a good buy.