Hex #664f83 or rgb(102,79,131) in RGB space is the tint of purple. It has hue angle of 266.54 degrees, value = 51 and saturation = 40. #664f83 can be obtained by mixing 4 colors: 2 drops of red, 4 drops of magenta, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #666699. Below you can see the block with #664f83 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664f83 to the mixer and play with it.