Hex #506940 or rgb(80,105,64) in RGB space is the tint of olive. It has hue angle of 96.59 degrees, value = 41 and saturation = 39. #506940 can be obtained by mixing 4 colors: 5 drops of red, 4 drops of cyan, 4 drops of green, 3 drops of black.
Nearest safe hex - #666633. Below you can see the block with #506940 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #506940 to the mixer and play with it.