Hex #5b718c or rgb(91,113,140) in RGB space is the tint of blue. It has hue angle of 213.06 degrees, value = 55 and saturation = 35. #5b718c can be obtained by mixing 4 colors: 5 drops of magenta, 2 drops of blue, 3 drops of cyan, 4 drops of green.
Nearest safe hex - #666699. Below you can see the block with #5b718c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b718c to the mixer and play with it.