Hex #66c55e or rgb(102,197,94) in RGB space is the tint of green. It has hue angle of 115.34 degrees, value = 77 and saturation = 52. #66c55e can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 3 drops of cyan, 3 drops of green.
Nearest safe hex - #66cc66. Below you can see the block with #66c55e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66c55e to the mixer and play with it.