Hex #71687b or rgb(113,104,123) in RGB space is the tint of purple. It has hue angle of 268.42 degrees, value = 48 and saturation = 15. #71687b can be obtained by mixing 4 colors: 3 drops of magenta, 2 drops of blue, 3 drops of green, 1 drop of white.
Nearest safe hex - #666666. Below you can see the block with #71687b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #71687b to the mixer and play with it.