Hex #15b487 or rgb(21,180,135) in RGB space is the tint of greenish cian. It has hue angle of 163.02 degrees, value = 71 and saturation = 88. #15b487 can be obtained by mixing 4 colors: 1 drop of magenta, 1 drop of blue, 5 drops of cyan, 5 drops of green.
Nearest safe hex - #00cc99. Below you can see the block with #15b487 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15b487 to the mixer and play with it.