Hex #507e55 or rgb(80,126,85) in RGB space is the tint of green. It has hue angle of 126.52 degrees, value = 49 and saturation = 37. #507e55 can be obtained by mixing 4 colors: 5 drops of yellow, 5 drops of blue, 2 drops of cyan, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #507e55 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #507e55 to the mixer and play with it.