Hex #664fa2 or rgb(102,79,162) in RGB space is the tint of purple violet. It has hue angle of 256.63 degrees, value = 64 and saturation = 51. #664fa2 can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of blue, 1 drop of green, 1 drop of white.
Nearest safe hex - #666699. Below you can see the block with #664fa2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664fa2 to the mixer and play with it.