Hex #408a2b or rgb(64,138,43) in RGB space is the tint of grass green. It has hue angle of 106.74 degrees, value = 54 and saturation = 69. #408a2b can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of green, 2 drops of white, 4 drops of black.
Nearest safe hex - #339933. Below you can see the block with #408a2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408a2b to the mixer and play with it.