Hex #559968 or rgb(85,153,104) in RGB space is the tint of bluish green. It has hue angle of 136.76 degrees, value = 60 and saturation = 44. #559968 can be obtained by mixing 4 colors: 1 drop of blue, 3 drops of green, 3 drops of white, 2 drops of black.
Nearest safe hex - #669966. Below you can see the block with #559968 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559968 to the mixer and play with it.