Hex #397f68 or rgb(57,127,104) in RGB space is the tint of greenish cian. It has hue angle of 160.29 degrees, value = 50 and saturation = 55. #397f68 can be obtained by mixing 4 colors: 5 drops of blue, 5 drops of green, 4 drops of white, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #397f68 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #397f68 to the mixer and play with it.