Hex #664ea2 or rgb(102,78,162) in RGB space is the tint of purple violet. It has hue angle of 257.14 degrees, value = 64 and saturation = 52. #664ea2 can be obtained by mixing 4 colors: 4 drops of magenta, 1 drop of blue, 3 drops of cyan, 2 drops of black.
Nearest safe hex - #666699. Below you can see the block with #664ea2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664ea2 to the mixer and play with it.