Hex #156839 or rgb(21,104,57) in RGB space is the tint of teal. It has hue angle of 146.02 degrees, value = 41 and saturation = 80. #156839 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of blue, 4 drops of green, 3 drops of black.
Nearest safe hex - #006633. Below you can see the block with #156839 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #156839 to the mixer and play with it.