Hex #155c1d or rgb(21,92,29) in RGB space is the tint of green. It has hue angle of 126.76 degrees, value = 36 and saturation = 77. #155c1d can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of blue, 4 drops of green, 5 drops of black.
Nearest safe hex - #006633. Below you can see the block with #155c1d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #155c1d to the mixer and play with it.