Hex #66a95b or rgb(102,169,91) in RGB space is the tint of grass green. It has hue angle of 111.54 degrees, value = 66 and saturation = 46. #66a95b can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of blue, 4 drops of green, 2 drops of white.
Nearest safe hex - #669966. Below you can see the block with #66a95b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a95b to the mixer and play with it.