Hex #178883 or rgb(23,136,131) in RGB space is the tint of cyan. It has hue angle of 177.35 degrees, value = 53 and saturation = 83. #178883 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #009999. Below you can see the block with #178883 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #178883 to the mixer and play with it.