Hex #55a333 or rgb(85,163,51) in RGB space is the tint of grass green. It has hue angle of 101.79 degrees, value = 64 and saturation = 69. #55a333 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of cyan, 3 drops of green, 4 drops of black.
Nearest safe hex - #669933. Below you can see the block with #55a333 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a333 to the mixer and play with it.