Hex #556755 or rgb(85,103,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 40 and saturation = 17. #556755 can be obtained by mixing 4 colors: 4 drops of red, 3 drops of blue, 2 drops of cyan, 3 drops of green.
Nearest safe hex - #666666. Below you can see the block with #556755 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556755 to the mixer and play with it.