Hex #663bb3 or rgb(102,59,179) in RGB space is the tint of purple violet. It has hue angle of 261.50 degrees, value = 70 and saturation = 67. #663bb3 can be obtained by mixing 3 colors: 4 drops of magenta, 5 drops of blue, 1 drop of cyan.
Nearest safe hex - #6633cc. Below you can see the block with #663bb3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663bb3 to the mixer and play with it.