Hex #399ba1 or rgb(57,155,161) in RGB space is the tint of cyan. It has hue angle of 183.46 degrees, value = 63 and saturation = 65. #399ba1 can be obtained by mixing 4 colors: 4 drops of blue, 1 drop of cyan, 2 drops of green, 2 drops of white.
Nearest safe hex - #339999. Below you can see the block with #399ba1 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #399ba1 to the mixer and play with it.