Hex #878aaa or rgb(135,138,170) in RGB space is the tint of violet. It has hue angle of 234.86 degrees, value = 67 and saturation = 21. #878aaa can be obtained by mixing 4 colors: 4 drops of red, 5 drops of blue, 3 drops of cyan, 5 drops of white.
Nearest safe hex - #999999. Below you can see the block with #878aaa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #878aaa to the mixer and play with it.