Hex #559fdc or rgb(85,159,220) in RGB space is the tint of blue. It has hue angle of 207.11 degrees, value = 86 and saturation = 61. #559fdc can be obtained by mixing 4 colors: 2 drops of magenta, 3 drops of blue, 5 drops of cyan, 2 drops of white.
Nearest safe hex - #6699cc. Below you can see the block with #559fdc color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559fdc to the mixer and play with it.