Hex #66b077 or rgb(102,176,119) in RGB space is the tint of bluish green. It has hue angle of 133.78 degrees, value = 69 and saturation = 42. #66b077 can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of cyan, 2 drops of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #66b077 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66b077 to the mixer and play with it.