Hex #15a295 or rgb(21,162,149) in RGB space is the tint of cyan. It has hue angle of 174.47 degrees, value = 64 and saturation = 87. #15a295 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of blue, 5 drops of cyan, 3 drops of green.
Nearest safe hex - #009999. Below you can see the block with #15a295 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15a295 to the mixer and play with it.