Hex #15ab95 or rgb(21,171,149) in RGB space is the tint of greenish cian. It has hue angle of 171.20 degrees, value = 67 and saturation = 88. #15ab95 can be obtained by mixing 4 colors: 1 drop of magenta, 2 drops of blue, 5 drops of cyan, 4 drops of green.
Nearest safe hex - #009999. Below you can see the block with #15ab95 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15ab95 to the mixer and play with it.