Hex #66bf77 or rgb(102,191,119) in RGB space is the tint of bluish green. It has hue angle of 131.46 degrees, value = 75 and saturation = 47. #66bf77 can be obtained by mixing 4 colors: 1 drop of magenta, 1 drop of cyan, 5 drops of green, 3 drops of white.
Nearest safe hex - #66cc66. Below you can see the block with #66bf77 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66bf77 to the mixer and play with it.