Hex #55c839 or rgb(85,200,57) in RGB space is the tint of grass green. It has hue angle of 108.25 degrees, value = 78 and saturation = 72. #55c839 can be obtained by mixing 4 colors: 4 drops of yellow, 1 drop of blue, 2 drops of cyan, 5 drops of green.
Nearest safe hex - #66cc33. Below you can see the block with #55c839 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55c839 to the mixer and play with it.