Hex #559b5d or rgb(85,155,93) in RGB space is the tint of green. It has hue angle of 126.86 degrees, value = 61 and saturation = 45. #559b5d can be obtained by mixing 4 colors: 3 drops of yellow, 5 drops of blue, 3 drops of green, 1 drop of white.
Nearest safe hex - #669966. Below you can see the block with #559b5d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559b5d to the mixer and play with it.