Hex #15956a or rgb(21,149,106) in RGB space is the tint of greenish cian. It has hue angle of 159.84 degrees, value = 58 and saturation = 86. #15956a can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of cyan, 2 drops of green, 4 drops of black.
Nearest safe hex - #009966. Below you can see the block with #15956a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15956a to the mixer and play with it.