Hex #405d60 or rgb(64,93,96) in RGB space is the tint of cyan. It has hue angle of 185.63 degrees, value = 38 and saturation = 33. #405d60 can be obtained by mixing 3 colors: 1 drop of cyan, 2 drops of white, 5 drops of black.
Nearest safe hex - #336666. Below you can see the block with #405d60 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405d60 to the mixer and play with it.