Hex #666a89 or rgb(102,106,137) in RGB space is the tint of violet. It has hue angle of 233.14 degrees, value = 54 and saturation = 26. #666a89 can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of blue, 4 drops of green, 2 drops of white.
Nearest safe hex - #666699. Below you can see the block with #666a89 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666a89 to the mixer and play with it.