Hex #278f4e or rgb(39,143,78) in RGB space is the tint of teal. It has hue angle of 142.50 degrees, value = 56 and saturation = 73. #278f4e can be obtained by mixing 4 colors: 2 drops of red, 4 drops of cyan, 5 drops of green, 2 drops of black.
Nearest safe hex - #339966. Below you can see the block with #278f4e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #278f4e to the mixer and play with it.