Hex #179b9b or rgb(23,155,155) in RGB space is the tint of cyan. It has hue angle of 180.00 degrees, value = 61 and saturation = 85. #179b9b can be obtained by mixing 4 colors: 1 drop of magenta, 3 drops of blue, 4 drops of cyan, 3 drops of green.
Nearest safe hex - #009999. Below you can see the block with #179b9b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #179b9b to the mixer and play with it.