Hex #408387 or rgb(64,131,135) in RGB space is the tint of cyan. It has hue angle of 183.38 degrees, value = 53 and saturation = 53. #408387 can be obtained by mixing 4 colors: 3 drops of magenta, 2 drops of blue, 3 drops of cyan, 4 drops of green.
Nearest safe hex - #339999. Below you can see the block with #408387 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408387 to the mixer and play with it.