Hex #66d1b3 or rgb(102,209,179) in RGB space is the tint of greenish cian. It has hue angle of 163.18 degrees, value = 82 and saturation = 51. #66d1b3 can be obtained by mixing 4 colors: 3 drops of cyan, 2 drops of green, 4 drops of white, 1 drop of black.
Nearest safe hex - #66cccc. Below you can see the block with #66d1b3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66d1b3 to the mixer and play with it.