Hex #669456 or rgb(102,148,86) in RGB space is the tint of grass green. It has hue angle of 104.52 degrees, value = 58 and saturation = 42. #669456 can be obtained by mixing 3 colors: 4 drops of yellow, 5 drops of blue, 1 drop of green.
Nearest safe hex - #669966. Below you can see the block with #669456 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669456 to the mixer and play with it.