Hex #55aa2b or rgb(85,170,43) in RGB space is the tint of grass green. It has hue angle of 100.16 degrees, value = 67 and saturation = 75. #55aa2b can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 1 drop of cyan, 3 drops of green.
Nearest safe hex - #669933. Below you can see the block with #55aa2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55aa2b to the mixer and play with it.