Hex #404d40 or rgb(64,77,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 30 and saturation = 17. #404d40 can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 3 drops of green, 2 drops of black.
Nearest safe hex - #336633. Below you can see the block with #404d40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404d40 to the mixer and play with it.