Hex #556955 or rgb(85,105,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 41 and saturation = 19. #556955 can be obtained by mixing 3 colors: 1 drop of green, 3 drops of white, 5 drops of black.
Nearest safe hex - #666666. Below you can see the block with #556955 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556955 to the mixer and play with it.