Hex #40b340 or rgb(64,179,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 70 and saturation = 64. #40b340 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 2 drops of cyan, 4 drops of green.
Nearest safe hex - #33cc33. Below you can see the block with #40b340 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b340 to the mixer and play with it.