Hex #40af20 or rgb(64,175,32) in RGB space is the tint of grass green. It has hue angle of 106.57 degrees, value = 69 and saturation = 82. #40af20 can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of green, 1 drop of white, 1 drop of black.
Nearest safe hex - #339933. Below you can see the block with #40af20 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40af20 to the mixer and play with it.