Hex #15726a or rgb(21,114,106) in RGB space is the tint of cyan. It has hue angle of 174.84 degrees, value = 45 and saturation = 82. #15726a can be obtained by mixing 4 colors: 1 drop of red, 5 drops of cyan, 1 drop of green, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #15726a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15726a to the mixer and play with it.