Hex #337780 or rgb(51,119,128) in RGB space is the tint of cyan. It has hue angle of 187.01 degrees, value = 50 and saturation = 60. #337780 can be obtained by mixing 3 colors: 2 drops of red, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #336699. Below you can see the block with #337780 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #337780 to the mixer and play with it.