Hex #66784a or rgb(102,120,74) in RGB space is the tint of olive. It has hue angle of 83.48 degrees, value = 47 and saturation = 38. #66784a can be obtained by mixing 4 colors: 5 drops of yellow, 5 drops of blue, 1 drop of white, 4 drops of black.
Nearest safe hex - #666633. Below you can see the block with #66784a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66784a to the mixer and play with it.