Hex #66edcc or rgb(102,237,204) in RGB space is the tint of greenish cian. It has hue angle of 165.33 degrees, value = 93 and saturation = 57. #66edcc can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of cyan, 1 drop of green, 3 drops of white.
Nearest safe hex - #66ffcc. Below you can see the block with #66edcc color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66edcc to the mixer and play with it.