Hex #55acd2 or rgb(85,172,210) in RGB space is the tint of bluish cian. It has hue angle of 198.24 degrees, value = 82 and saturation = 60. #55acd2 can be obtained by mixing 4 colors: 5 drops of blue, 4 drops of cyan, 5 drops of white, 1 drop of black.
Nearest safe hex - #6699cc. Below you can see the block with #55acd2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55acd2 to the mixer and play with it.