Hex #667b44 or rgb(102,123,68) in RGB space is the tint of olive. It has hue angle of 82.91 degrees, value = 48 and saturation = 45. #667b44 can be obtained by mixing 3 colors: 2 drops of yellow, 2 drops of blue, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #667b44 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667b44 to the mixer and play with it.