Hex #667b8e or rgb(102,123,142) in RGB space is the tint of blue. It has hue angle of 208.50 degrees, value = 56 and saturation = 28. #667b8e can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of blue, 4 drops of green, 3 drops of white.
Nearest safe hex - #666699. Below you can see the block with #667b8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667b8e to the mixer and play with it.