Hex #408d40 or rgb(64,141,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 55 and saturation = 55. #408d40 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of cyan, 1 drop of green, 3 drops of black.
Nearest safe hex - #339933. Below you can see the block with #408d40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408d40 to the mixer and play with it.