Hex #717f8e or rgb(113,127,142) in RGB space is the tint of blue. It has hue angle of 211.03 degrees, value = 56 and saturation = 20. #717f8e can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of blue, 5 drops of green, 4 drops of white.
Nearest safe hex - #666699. Below you can see the block with #717f8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #717f8e to the mixer and play with it.