Hex #557b95 or rgb(85,123,149) in RGB space is the tint of blue. It has hue angle of 204.38 degrees, value = 58 and saturation = 43. #557b95 can be obtained by mixing 4 colors: 3 drops of blue, 1 drop of cyan, 4 drops of white, 4 drops of black.
Nearest safe hex - #666699. Below you can see the block with #557b95 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557b95 to the mixer and play with it.