Hex #178d65 or rgb(23,141,101) in RGB space is the tint of greenish cian. It has hue angle of 159.66 degrees, value = 55 and saturation = 84. #178d65 can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of blue, 1 drop of cyan, 4 drops of green.
Nearest safe hex - #009966. Below you can see the block with #178d65 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #178d65 to the mixer and play with it.