Hex #409a40 or rgb(64,154,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 60 and saturation = 58. #409a40 can be obtained by mixing 3 colors: 2 drops of green, 1 drop of white, 1 drop of black.
Nearest safe hex - #339933. Below you can see the block with #409a40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #409a40 to the mixer and play with it.