Hex #55d255 or rgb(85,210,85) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 82 and saturation = 60. #55d255 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of cyan, 5 drops of green, 2 drops of white.
Nearest safe hex - #66cc66. Below you can see the block with #55d255 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55d255 to the mixer and play with it.