Hex #66a75e or rgb(102,167,94) in RGB space is the tint of green. It has hue angle of 113.42 degrees, value = 65 and saturation = 44. #66a75e can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of green, 3 drops of white, 1 drop of black.
Nearest safe hex - #669966. Below you can see the block with #66a75e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a75e to the mixer and play with it.