Hex #154b47 or rgb(21,75,71) in RGB space is the tint of cyan. It has hue angle of 175.56 degrees, value = 29 and saturation = 72. #154b47 can be obtained by mixing 4 colors: 1 drop of red, 5 drops of blue, 3 drops of green, 3 drops of black.
Nearest safe hex - #003333. Below you can see the block with #154b47 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #154b47 to the mixer and play with it.