Hex #509830 or rgb(80,152,48) in RGB space is the tint of grass green. It has hue angle of 101.54 degrees, value = 60 and saturation = 68. #509830 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of cyan, 3 drops of green, 5 drops of black.
Nearest safe hex - #669933. Below you can see the block with #509830 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #509830 to the mixer and play with it.