Hex #407820 or rgb(64,120,32) in RGB space is the tint of grass green. It has hue angle of 98.18 degrees, value = 47 and saturation = 73. #407820 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of cyan, 4 drops of green, 1 drop of black.
Nearest safe hex - #336633. Below you can see the block with #407820 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407820 to the mixer and play with it.