Hex #55ac2b or rgb(85,172,43) in RGB space is the tint of grass green. It has hue angle of 100.47 degrees, value = 67 and saturation = 75. #55ac2b can be obtained by mixing 3 colors: 4 drops of yellow, 3 drops of blue, 5 drops of green.
Nearest safe hex - #669933. Below you can see the block with #55ac2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55ac2b to the mixer and play with it.