Hex #406940 or rgb(64,105,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 41 and saturation = 39. #406940 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of cyan, 1 drop of green, 1 drop of black.
Nearest safe hex - #336633. Below you can see the block with #406940 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406940 to the mixer and play with it.