Hex #667faa or rgb(102,127,170) in RGB space is the tint of blue violet. It has hue angle of 217.94 degrees, value = 67 and saturation = 40. #667faa can be obtained by mixing 4 colors: 1 drop of red, 2 drops of blue, 1 drop of cyan, 1 drop of white.
Nearest safe hex - #666699. Below you can see the block with #667faa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667faa to the mixer and play with it.