Hex #557755 or rgb(85,119,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 47 and saturation = 29. #557755 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of cyan, 2 drops of green, 1 drop of black.
Nearest safe hex - #666666. Below you can see the block with #557755 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557755 to the mixer and play with it.