Hex #409a15 or rgb(64,154,21) in RGB space is the tint of grass green. It has hue angle of 100.60 degrees, value = 60 and saturation = 86. #409a15 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of cyan, 5 drops of green, 3 drops of black.
Nearest safe hex - #339900. Below you can see the block with #409a15 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #409a15 to the mixer and play with it.