Hex #667855 or rgb(102,120,85) in RGB space is the tint of olive. It has hue angle of 90.86 degrees, value = 47 and saturation = 29. #667855 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 1 drop of cyan, 2 drops of green.
Nearest safe hex - #666666. Below you can see the block with #667855 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667855 to the mixer and play with it.