Hex #407f40 or rgb(64,127,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 50 and saturation = 50. #407f40 can be obtained by mixing 4 colors: 2 drops of red, 2 drops of cyan, 3 drops of green, 1 drop of black.
Nearest safe hex - #336633. Below you can see the block with #407f40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407f40 to the mixer and play with it.