Hex #278383 or rgb(39,131,131) in RGB space is the tint of cyan. It has hue angle of 180.00 degrees, value = 51 and saturation = 70. #278383 can be obtained by mixing 4 colors: 2 drops of yellow, 4 drops of blue, 4 drops of cyan, 3 drops of black.
Nearest safe hex - #339999. Below you can see the block with #278383 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #278383 to the mixer and play with it.