Hex #557c47 or rgb(85,124,71) in RGB space is the tint of grass green. It has hue angle of 104.15 degrees, value = 49 and saturation = 43. #557c47 can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of blue, 1 drop of green, 2 drops of black.
Nearest safe hex - #666633. Below you can see the block with #557c47 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557c47 to the mixer and play with it.