Hex #39637b or rgb(57,99,123) in RGB space is the tint of bluish cian. It has hue angle of 201.82 degrees, value = 48 and saturation = 54. #39637b can be obtained by mixing 4 colors: 2 drops of blue, 1 drop of cyan, 2 drops of white, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #39637b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #39637b to the mixer and play with it.