Hex #405640 or rgb(64,86,64) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 34 and saturation = 26. #405640 can be obtained by mixing 3 colors: 1 drop of green, 2 drops of white, 5 drops of black.
Nearest safe hex - #336633. Below you can see the block with #405640 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405640 to the mixer and play with it.