Hex #664866 or rgb(102,72,102) in RGB space is the tint of magenta. It has hue angle of 300.00 degrees, value = 40 and saturation = 29. #664866 can be obtained by mixing 4 colors: 2 drops of red, 3 drops of blue, 2 drops of white, 3 drops of black.
Nearest safe hex - #663366. Below you can see the block with #664866 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664866 to the mixer and play with it.