Grey/blue — Grey/blue is a distinctive shade whose name reflects its overall visual character. It belongs to the Blue and Gray family: a medium-toned, muted tone with hex code #647D8E and RGB values of 100, 125, 142. Its dominant channel values give it a cool undertone that reads as muted rather than flat. Grey/blue pairs well with complementary tones from the opposite side of the color wheel and works nicely in packaging design. Nearest neighbors: cobalt.