Hex #55acbd or rgb(85,172,189) in RGB space is the tint of bluish cian. It has hue angle of 189.81 degrees, value = 74 and saturation = 55. #55acbd can be obtained by mixing 4 colors: 1 drop of blue, 3 drops of cyan, 3 drops of white, 2 drops of black.
Nearest safe hex - #6699cc. Below you can see the block with #55acbd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55acbd to the mixer and play with it.