Hex #55959c or rgb(85,149,156) in RGB space is the tint of cyan. It has hue angle of 185.92 degrees, value = 61 and saturation = 46. #55959c can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 3 drops of cyan, 1 drop of green.
Nearest safe hex - #669999. Below you can see the block with #55959c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55959c to the mixer and play with it.