Hex #559147 or rgb(85,145,71) in RGB space is the tint of grass green. It has hue angle of 108.65 degrees, value = 57 and saturation = 51. #559147 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of blue, 3 drops of green, 1 drop of white.
Nearest safe hex - #669933. Below you can see the block with #559147 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559147 to the mixer and play with it.