Hex #557ca3 or rgb(85,124,163) in RGB space is the tint of blue. It has hue angle of 210.00 degrees, value = 64 and saturation = 48. #557ca3 can be obtained by mixing 4 colors: 3 drops of red, 4 drops of blue, 4 drops of cyan, 1 drop of white.
Nearest safe hex - #666699. Below you can see the block with #557ca3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557ca3 to the mixer and play with it.