Hex #407620 or rgb(64,118,32) in RGB space is the tint of grass green. It has hue angle of 97.67 degrees, value = 46 and saturation = 73. #407620 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of blue, 4 drops of green, 5 drops of black.
Nearest safe hex - #336633. Below you can see the block with #407620 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407620 to the mixer and play with it.