Hex #557199 or rgb(85,113,153) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 60 and saturation = 44. #557199 can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of cyan, 2 drops of white, 5 drops of black.
Nearest safe hex - #666699. Below you can see the block with #557199 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557199 to the mixer and play with it.