Hex #77de66 or rgb(119,222,102) in RGB space is the tint of grass green. It has hue angle of 111.50 degrees, value = 87 and saturation = 54. #77de66 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of cyan, 5 drops of green, 3 drops of white.
Nearest safe hex - #66cc66. Below you can see the block with #77de66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #77de66 to the mixer and play with it.