Hex #66ab77 or rgb(102,171,119) in RGB space is the tint of bluish green. It has hue angle of 134.78 degrees, value = 67 and saturation = 40. #66ab77 can be obtained by mixing 3 colors: 2 drops of yellow, 2 drops of blue, 1 drop of cyan.
Nearest safe hex - #669966. Below you can see the block with #66ab77 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66ab77 to the mixer and play with it.