Hex #66b677 or rgb(102,182,119) in RGB space is the tint of bluish green. It has hue angle of 132.75 degrees, value = 71 and saturation = 44. #66b677 can be obtained by mixing 4 colors: 1 drop of blue, 4 drops of green, 4 drops of white, 1 drop of black.
Nearest safe hex - #66cc66. Below you can see the block with #66b677 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66b677 to the mixer and play with it.