Hex #87987d or rgb(135,152,125) in RGB space is the tint of grass green. It has hue angle of 97.78 degrees, value = 60 and saturation = 18. #87987d can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of blue, 5 drops of white, 3 drops of black.
Nearest safe hex - #999966. Below you can see the block with #87987d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #87987d to the mixer and play with it.