Hex #408c90 or rgb(64,140,144) in RGB space is the tint of cyan. It has hue angle of 183.00 degrees, value = 56 and saturation = 56. #408c90 can be obtained by mixing 4 colors: 4 drops of magenta, 2 drops of blue, 5 drops of cyan, 5 drops of green.
Nearest safe hex - #339999. Below you can see the block with #408c90 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408c90 to the mixer and play with it.