Hex #154e39 or rgb(21,78,57) in RGB space is the tint of greenish cian. It has hue angle of 157.89 degrees, value = 31 and saturation = 73. #154e39 can be obtained by mixing 4 colors: 1 drop of magenta, 3 drops of blue, 4 drops of green, 4 drops of black.
Nearest safe hex - #006633. Below you can see the block with #154e39 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #154e39 to the mixer and play with it.