Hex #157e5d or rgb(21,126,93) in RGB space is the tint of greenish cian. It has hue angle of 161.14 degrees, value = 49 and saturation = 83. #157e5d can be obtained by mixing 4 colors: 5 drops of blue, 5 drops of green, 1 drop of white, 1 drop of black.
Nearest safe hex - #006666. Below you can see the block with #157e5d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #157e5d to the mixer and play with it.