Hex #15b479 or rgb(21,180,121) in RGB space is the tint of greenish cian. It has hue angle of 157.74 degrees, value = 71 and saturation = 88. #15b479 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of blue, 5 drops of cyan, 5 drops of green.
Nearest safe hex - #00cc66. Below you can see the block with #15b479 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15b479 to the mixer and play with it.