Hex #661c78 or rgb(102,28,120) in RGB space is the tint of purple magenta. It has hue angle of 288.26 degrees, value = 47 and saturation = 77. #661c78 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 4 drops of blue, 2 drops of black.
Nearest safe hex - #663366. Below you can see the block with #661c78 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #661c78 to the mixer and play with it.