Hex #558455 or rgb(85,132,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 52 and saturation = 36. #558455 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of red, 3 drops of cyan, 3 drops of black.
Nearest safe hex - #669966. Below you can see the block with #558455 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558455 to the mixer and play with it.