Hex #55ad99 or rgb(85,173,153) in RGB space is the tint of greenish cian. It has hue angle of 166.36 degrees, value = 68 and saturation = 51. #55ad99 can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of cyan, 5 drops of green, 2 drops of white.
Nearest safe hex - #669999. Below you can see the block with #55ad99 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55ad99 to the mixer and play with it.