Hex #66cc88 or rgb(102,204,136) in RGB space is the tint of bluish green. It has hue angle of 140.00 degrees, value = 80 and saturation = 50. #66cc88 can be obtained by mixing 3 colors: 2 drops of yellow, 1 drop of blue, 2 drops of cyan.
Nearest safe hex - #66cc99. Below you can see the block with #66cc88 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66cc88 to the mixer and play with it.