Hex #668967 or rgb(102,137,103) in RGB space is the tint of green. It has hue angle of 121.71 degrees, value = 54 and saturation = 26. #668967 can be obtained by mixing 2 colors: 2 drops of yellow, 3 drops of blue.
Nearest safe hex - #669966. Below you can see the block with #668967 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668967 to the mixer and play with it.