Hex #66a177 or rgb(102,161,119) in RGB space is the tint of bluish green. It has hue angle of 137.29 degrees, value = 63 and saturation = 37. #66a177 can be obtained by mixing 4 colors: 4 drops of red, 5 drops of cyan, 4 drops of green, 2 drops of white.
Nearest safe hex - #669966. Below you can see the block with #66a177 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a177 to the mixer and play with it.