Hex #99d9cc or rgb(153,217,204) in RGB space is the tint of greenish cian. It has hue angle of 167.81 degrees, value = 85 and saturation = 29. #99d9cc can be obtained by mixing 4 colors: 1 drop of red, 3 drops of cyan, 1 drop of green, 5 drops of white.
Nearest safe hex - #99cccc. Below you can see the block with #99d9cc color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99d9cc to the mixer and play with it.