Hex #663e9a or rgb(102,62,154) in RGB space is the tint of purple. It has hue angle of 266.09 degrees, value = 60 and saturation = 60. #663e9a can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 1 drop of cyan, 1 drop of black.
Nearest safe hex - #663399. Below you can see the block with #663e9a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663e9a to the mixer and play with it.