Hex #6dde5b or rgb(109,222,91) in RGB space is the tint of grass green. It has hue angle of 111.76 degrees, value = 87 and saturation = 59. #6dde5b can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 4 drops of green, 1 drop of white.
Nearest safe hex - #66cc66. Below you can see the block with #6dde5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6dde5b to the mixer and play with it.