The dark gray is definitely on the blue side but nothing I didn't already expect from other reviews. It was too easy to assemble: just had to screw the legs on. They were packed inside a pocket under the sofa and I thought they were missing at first. The depth of the seat is great. I don't like a fluffy-lazy-boy kind of sofa so, with a couple throw pillows, I think the firmness is just right. It is a good buy and the quality was very nice. I should note that I did buy this on sale. I am very satisfied with this purchase.