This sink is the second sink purchased from Wayfair in a month.  The first "gray" color was tinted with aqua.  The sink pictured here, described as "gray onyx"  has a definite green color in the gray.  It looked OK in the box but after it was installed and had more light hitting it, the green cast was very visible.  I am going to have to have them (2) replaced when I find a suitable, real, and only GRAY color vessel sink.