Hex #15aeb9 or rgb(21,174,185) in RGB space is the tint of cyan. It has hue angle of 184.02 degrees, value = 73 and saturation = 89. #15aeb9 can be obtained by mixing 4 colors: 4 drops of blue, 5 drops of cyan, 2 drops of green, 1 drop of white.
Nearest safe hex - #0099cc. Below you can see the block with #15aeb9 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15aeb9 to the mixer and play with it.