Hex #666dcd or rgb(102,109,205) in RGB space is the tint of violet. It has hue angle of 235.92 degrees, value = 80 and saturation = 50. #666dcd can be obtained by mixing 3 colors: 2 drops of magenta, 1 drop of blue, 2 drops of cyan.
Nearest safe hex - #6666cc. Below you can see the block with #666dcd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666dcd to the mixer and play with it.