Hex #39505f or rgb(57,80,95) in RGB space is the tint of blue. It has hue angle of 203.68 degrees, value = 37 and saturation = 40. #39505f can be obtained by mixing 3 colors: 2 drops of red, 5 drops of blue, 2 drops of green.
Nearest safe hex - #336666. Below you can see the block with #39505f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #39505f to the mixer and play with it.