Hex #558cda or rgb(85,140,218) in RGB space is the tint of blue. It has hue angle of 215.19 degrees, value = 85 and saturation = 61. #558cda can be obtained by mixing 3 colors: 3 drops of magenta, 1 drop of blue, 5 drops of cyan.
Nearest safe hex - #6699cc. Below you can see the block with #558cda color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558cda to the mixer and play with it.