Hex #558ad5 or rgb(85,138,213) in RGB space is the tint of blue. It has hue angle of 215.16 degrees, value = 84 and saturation = 60. #558ad5 can be obtained by mixing 4 colors: 3 drops of magenta, 3 drops of blue, 5 drops of cyan, 1 drop of white.
Nearest safe hex - #6699cc. Below you can see the block with #558ad5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558ad5 to the mixer and play with it.