Hex #66c877 or rgb(102,200,119) in RGB space is the tint of bluish green. It has hue angle of 130.41 degrees, value = 78 and saturation = 49. #66c877 can be obtained by mixing 3 colors: 1 drop of blue, 5 drops of green, 4 drops of white.
Nearest safe hex - #66cc66. Below you can see the block with #66c877 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66c877 to the mixer and play with it.