Hex #558655 or rgb(85,134,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 53 and saturation = 37. #558655 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of cyan, 1 drop of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #558655 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558655 to the mixer and play with it.