Hex #559a44 or rgb(85,154,68) in RGB space is the tint of grass green. It has hue angle of 108.14 degrees, value = 60 and saturation = 56. #559a44 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 1 drop of green, 5 drops of black.
Nearest safe hex - #669933. Below you can see the block with #559a44 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559a44 to the mixer and play with it.