Hex #5599d5 or rgb(85,153,213) in RGB space is the tint of blue. It has hue angle of 208.13 degrees, value = 84 and saturation = 60. #5599d5 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 3 drops of cyan, 3 drops of white.
Nearest safe hex - #6699cc. Below you can see the block with #5599d5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5599d5 to the mixer and play with it.