Hex #87b978 or rgb(135,185,120) in RGB space is the tint of grass green. It has hue angle of 106.15 degrees, value = 73 and saturation = 35. #87b978 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 4 drops of white, 4 drops of black.
Nearest safe hex - #99cc66. Below you can see the block with #87b978 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #87b978 to the mixer and play with it.