Hex #55c740 or rgb(85,199,64) in RGB space is the tint of grass green. It has hue angle of 110.67 degrees, value = 78 and saturation = 68. #55c740 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of cyan, 4 drops of green, 1 drop of black.
Nearest safe hex - #66cc33. Below you can see the block with #55c740 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55c740 to the mixer and play with it.