Hex #4ecf5c or rgb(78,207,92) in RGB space is the tint of green. It has hue angle of 126.51 degrees, value = 81 and saturation = 62. #4ecf5c can be obtained by mixing 4 colors: 4 drops of yellow, 1 drop of blue, 4 drops of cyan, 4 drops of green.
Nearest safe hex - #66cc66. Below you can see the block with #4ecf5c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4ecf5c to the mixer and play with it.