Hex #407a2b or rgb(64,122,43) in RGB space is the tint of grass green. It has hue angle of 104.05 degrees, value = 48 and saturation = 65. #407a2b can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 1 drop of blue, 5 drops of green.
Nearest safe hex - #336633. Below you can see the block with #407a2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407a2b to the mixer and play with it.