Hex #55a644 or rgb(85,166,68) in RGB space is the tint of grass green. It has hue angle of 109.59 degrees, value = 65 and saturation = 59. #55a644 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 2 drops of green, 4 drops of black.
Nearest safe hex - #669933. Below you can see the block with #55a644 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a644 to the mixer and play with it.