Hex #156956 or rgb(21,105,86) in RGB space is the tint of greenish cian. It has hue angle of 166.43 degrees, value = 41 and saturation = 80. #156956 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 5 drops of green, 1 drop of black.
Nearest safe hex - #006666. Below you can see the block with #156956 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #156956 to the mixer and play with it.