Hex #3981aa or rgb(57,129,170) in RGB space is the tint of bluish cian. It has hue angle of 201.77 degrees, value = 67 and saturation = 66. #3981aa can be obtained by mixing 3 colors: 2 drops of red, 3 drops of blue, 4 drops of cyan.
Nearest safe hex - #339999. Below you can see the block with #3981aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #3981aa to the mixer and play with it.