Hex #66af66 or rgb(102,175,102) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 69 and saturation = 42. #66af66 can be obtained by mixing 4 colors: 5 drops of yellow, 5 drops of cyan, 1 drop of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #66af66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66af66 to the mixer and play with it.