The sofa is very firm it is not something you sink into. The color seems to change depending on lighting, it does have a touch of blue in it. The back comes up a bit shorter than expected it hits me about 2/3 of the way up my back and I'm 5'3'. Very happy with it. 
The 2 slates in the middle were too short but it was easy to order replacements. 
The only thing that was not happy with was that the delivery was not to my porch it was at the end of my driveway. That made me feel uneasy because it could have been easily stolen.