Hex #557c44 or rgb(85,124,68) in RGB space is the tint of grass green. It has hue angle of 101.79 degrees, value = 49 and saturation = 45. #557c44 can be obtained by mixing 4 colors: 5 drops of red, 4 drops of cyan, 5 drops of green, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #557c44 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557c44 to the mixer and play with it.