Hex #397e9c or rgb(57,126,156) in RGB space is the tint of bluish cian. It has hue angle of 198.18 degrees, value = 61 and saturation = 63. #397e9c can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of blue, 5 drops of cyan, 4 drops of green.
Nearest safe hex - #336699. Below you can see the block with #397e9c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #397e9c to the mixer and play with it.