Hex #66e0c4 or rgb(102,224,196) in RGB space is the tint of greenish cian. It has hue angle of 166.23 degrees, value = 88 and saturation = 54. #66e0c4 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of blue, 5 drops of cyan, 2 drops of white.
Nearest safe hex - #66cccc. Below you can see the block with #66e0c4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66e0c4 to the mixer and play with it.