Hex #39871c or rgb(57,135,28) in RGB space is the tint of grass green. It has hue angle of 103.74 degrees, value = 53 and saturation = 79. #39871c can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #339933. Below you can see the block with #39871c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #39871c to the mixer and play with it.