Hex #55af33 or rgb(85,175,51) in RGB space is the tint of grass green. It has hue angle of 103.55 degrees, value = 69 and saturation = 71. #55af33 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of cyan, 4 drops of green, 3 drops of black.
Nearest safe hex - #669933. Below you can see the block with #55af33 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55af33 to the mixer and play with it.