Hex #40cc40 or rgb(64,204,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 80 and saturation = 69. #40cc40 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #33cc33. Below you can see the block with #40cc40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40cc40 to the mixer and play with it.