Hex #66a55e or rgb(102,165,94) in RGB space is the tint of green. It has hue angle of 113.24 degrees, value = 65 and saturation = 43. #66a55e can be obtained by mixing 4 colors: 4 drops of yellow, 4 drops of blue, 1 drop of cyan, 1 drop of green.
Nearest safe hex - #669966. Below you can see the block with #66a55e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a55e to the mixer and play with it.