Hex #558247 or rgb(85,130,71) in RGB space is the tint of grass green. It has hue angle of 105.76 degrees, value = 51 and saturation = 45. #558247 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 1 drop of cyan, 3 drops of green.
Nearest safe hex - #669933. Below you can see the block with #558247 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558247 to the mixer and play with it.