Hex #55ddbd or rgb(85,221,189) in RGB space is the tint of greenish cian. It has hue angle of 165.88 degrees, value = 87 and saturation = 62. #55ddbd can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of blue, 5 drops of cyan, 1 drop of white.
Nearest safe hex - #66cccc. Below you can see the block with #55ddbd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55ddbd to the mixer and play with it.