Hex #663b6f or rgb(102,59,111) in RGB space is the tint of purple magenta. It has hue angle of 289.62 degrees, value = 44 and saturation = 47. #663b6f can be obtained by mixing 3 colors: 4 drops of red, 5 drops of blue, 1 drop of cyan.
Nearest safe hex - #663366. Below you can see the block with #663b6f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663b6f to the mixer and play with it.