Hex #55a897 or rgb(85,168,151) in RGB space is the tint of greenish cian. It has hue angle of 167.71 degrees, value = 66 and saturation = 49. #55a897 can be obtained by mixing 4 colors: 2 drops of magenta, 3 drops of cyan, 3 drops of green, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #55a897 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a897 to the mixer and play with it.