Hex #40912b or rgb(64,145,43) in RGB space is the tint of grass green. It has hue angle of 107.65 degrees, value = 57 and saturation = 70. #40912b can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of blue, 3 drops of green, 1 drop of black.
Nearest safe hex - #339933. Below you can see the block with #40912b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40912b to the mixer and play with it.