Hex #556e83 or rgb(85,110,131) in RGB space is the tint of blue. It has hue angle of 207.39 degrees, value = 51 and saturation = 35. #556e83 can be obtained by mixing 4 colors: 5 drops of red, 4 drops of blue, 5 drops of cyan, 1 drop of green.
Nearest safe hex - #666699. Below you can see the block with #556e83 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556e83 to the mixer and play with it.