Hex #55d039 or rgb(85,208,57) in RGB space is the tint of grass green. It has hue angle of 108.87 degrees, value = 82 and saturation = 73. #55d039 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #66cc33. Below you can see the block with #55d039 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55d039 to the mixer and play with it.