Hex #159b9c or rgb(21,155,156) in RGB space is the tint of cyan. It has hue angle of 180.44 degrees, value = 61 and saturation = 87. #159b9c can be obtained by mixing 4 colors: 5 drops of blue, 3 drops of cyan, 3 drops of green, 1 drop of white.
Nearest safe hex - #009999. Below you can see the block with #159b9c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #159b9c to the mixer and play with it.