Hex #80639c or rgb(128,99,156) in RGB space is the tint of purple. It has hue angle of 270.53 degrees, value = 61 and saturation = 37. #80639c can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of magenta, 4 drops of cyan, 2 drops of black.
Nearest safe hex - #996699. Below you can see the block with #80639c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80639c to the mixer and play with it.