Hex #55b244 or rgb(85,178,68) in RGB space is the tint of grass green. It has hue angle of 110.73 degrees, value = 70 and saturation = 62. #55b244 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 3 drops of green, 3 drops of black.
Nearest safe hex - #669933. Below you can see the block with #55b244 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55b244 to the mixer and play with it.