Hex #558cb4 or rgb(85,140,180) in RGB space is the tint of blue. It has hue angle of 205.26 degrees, value = 71 and saturation = 53. #558cb4 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of magenta, 1 drop of blue, 5 drops of cyan.
Nearest safe hex - #6699cc. Below you can see the block with #558cb4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558cb4 to the mixer and play with it.