Hex #40b320 or rgb(64,179,32) in RGB space is the tint of grass green. It has hue angle of 106.94 degrees, value = 70 and saturation = 82. #40b320 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of cyan, 4 drops of green, 1 drop of black.
Nearest safe hex - #33cc33. Below you can see the block with #40b320 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b320 to the mixer and play with it.