Hex #4dd133 or rgb(77,209,51) in RGB space is the tint of grass green. It has hue angle of 110.13 degrees, value = 82 and saturation = 76. #4dd133 can be obtained by mixing 3 colors: 3 drops of yellow, 2 drops of cyan, 5 drops of green.
Nearest safe hex - #66cc33. Below you can see the block with #4dd133 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4dd133 to the mixer and play with it.