Hex #409f15 or rgb(64,159,21) in RGB space is the tint of grass green. It has hue angle of 101.30 degrees, value = 62 and saturation = 87. #409f15 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of blue, 4 drops of green, 1 drop of black.
Nearest safe hex - #339900. Below you can see the block with #409f15 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #409f15 to the mixer and play with it.