Hex #155d2b or rgb(21,93,43) in RGB space is the tint of bluish green. It has hue angle of 138.33 degrees, value = 36 and saturation = 77. #155d2b can be obtained by mixing 4 colors: 1 drop of red, 3 drops of blue, 5 drops of green, 3 drops of black.
Nearest safe hex - #006633. Below you can see the block with #155d2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #155d2b to the mixer and play with it.