Hex #77bd55 or rgb(119,189,85) in RGB space is the tint of grass green. It has hue angle of 100.38 degrees, value = 74 and saturation = 55. #77bd55 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of blue, 5 drops of green, 3 drops of white.
Nearest safe hex - #66cc66. Below you can see the block with #77bd55 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #77bd55 to the mixer and play with it.