Hex #12483d or rgb(18,72,61) in RGB space is the tint of greenish cian. It has hue angle of 167.78 degrees, value = 28 and saturation = 75. #12483d can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of blue, 4 drops of green, 5 drops of black.
Nearest safe hex - #003333. Below you can see the block with #12483d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #12483d to the mixer and play with it.