Hex #158b40 or rgb(21,139,64) in RGB space is the tint of bluish green. It has hue angle of 141.86 degrees, value = 55 and saturation = 85. #158b40 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of cyan, 4 drops of green, 4 drops of black.
Nearest safe hex - #009933. Below you can see the block with #158b40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #158b40 to the mixer and play with it.