Hex #557da5 or rgb(85,125,165) in RGB space is the tint of blue. It has hue angle of 210.00 degrees, value = 65 and saturation = 48. #557da5 can be obtained by mixing 4 colors: 5 drops of magenta, 2 drops of blue, 5 drops of cyan, 3 drops of green.
Nearest safe hex - #666699. Below you can see the block with #557da5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557da5 to the mixer and play with it.