Hex #506c50 or rgb(80,108,80) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 42 and saturation = 26. #506c50 can be obtained by mixing 4 colors: 5 drops of red, 5 drops of cyan, 3 drops of green, 3 drops of black.
Nearest safe hex - #666666. Below you can see the block with #506c50 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #506c50 to the mixer and play with it.