Hex #559ac7 or rgb(85,154,199) in RGB space is the tint of blue. It has hue angle of 203.68 degrees, value = 78 and saturation = 57. #559ac7 can be obtained by mixing 4 colors: 5 drops of blue, 2 drops of cyan, 4 drops of white, 1 drop of black.
Nearest safe hex - #6699cc. Below you can see the block with #559ac7 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559ac7 to the mixer and play with it.