Hex #557c39 or rgb(85,124,57) in RGB space is the tint of olive. It has hue angle of 94.93 degrees, value = 49 and saturation = 54. #557c39 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 2 drops of blue, 2 drops of green.
Nearest safe hex - #666633. Below you can see the block with #557c39 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557c39 to the mixer and play with it.