Hex #398d13 or rgb(57,141,19) in RGB space is the tint of grass green. It has hue angle of 101.31 degrees, value = 55 and saturation = 87. #398d13 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of blue, 4 drops of green, 2 drops of black.
Nearest safe hex - #339900. Below you can see the block with #398d13 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #398d13 to the mixer and play with it.