Hex #66d15e or rgb(102,209,94) in RGB space is the tint of green. It has hue angle of 115.83 degrees, value = 82 and saturation = 55. #66d15e can be obtained by mixing 4 colors: 4 drops of yellow, 1 drop of blue, 3 drops of cyan, 2 drops of green.
Nearest safe hex - #66cc66. Below you can see the block with #66d15e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66d15e to the mixer and play with it.