Hex #669766 or rgb(102,151,102) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 59 and saturation = 32. #669766 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of cyan, 3 drops of green, 1 drop of white.
Nearest safe hex - #669966. Below you can see the block with #669766 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669766 to the mixer and play with it.