Hex #99e5dd or rgb(153,229,221) in RGB space is the tint of cyan. It has hue angle of 173.68 degrees, value = 90 and saturation = 33. #99e5dd can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 3 drops of cyan, 5 drops of white.
Nearest safe hex - #99cccc. Below you can see the block with #99e5dd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99e5dd to the mixer and play with it.