Hex #667480 or rgb(102,116,128) in RGB space is the tint of blue. It has hue angle of 207.69 degrees, value = 50 and saturation = 20. #667480 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 3 drops of blue, 3 drops of cyan.
Nearest safe hex - #666699. Below you can see the block with #667480 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667480 to the mixer and play with it.