Hex #40ac20 or rgb(64,172,32) in RGB space is the tint of grass green. It has hue angle of 106.29 degrees, value = 67 and saturation = 81. #40ac20 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 1 drop of cyan, 5 drops of green.
Nearest safe hex - #339933. Below you can see the block with #40ac20 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40ac20 to the mixer and play with it.