Hex #66ae66 or rgb(102,174,102) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 68 and saturation = 41. #66ae66 can be obtained by mixing 3 colors: 2 drops of green, 2 drops of white, 1 drop of black.
Nearest safe hex - #669966. Below you can see the block with #66ae66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66ae66 to the mixer and play with it.