Hex #66af77 or rgb(102,175,119) in RGB space is the tint of bluish green. It has hue angle of 133.97 degrees, value = 69 and saturation = 42. #66af77 can be obtained by mixing 4 colors: 3 drops of red, 4 drops of cyan, 5 drops of green, 3 drops of white.
Nearest safe hex - #669966. Below you can see the block with #66af77 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66af77 to the mixer and play with it.