Hex #4db91a or rgb(77,185,26) in RGB space is the tint of grass green. It has hue angle of 100.75 degrees, value = 73 and saturation = 86. #4db91a can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of cyan, 5 drops of green, 1 drop of black.
Nearest safe hex - #66cc33. Below you can see the block with #4db91a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4db91a to the mixer and play with it.