Hex #339d91 or rgb(51,157,145) in RGB space is the tint of cyan. It has hue angle of 173.21 degrees, value = 62 and saturation = 68. #339d91 can be obtained by mixing 4 colors: 4 drops of blue, 1 drop of cyan, 3 drops of green, 2 drops of white.
Nearest safe hex - #339999. Below you can see the block with #339d91 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #339d91 to the mixer and play with it.