Hex #99cbbb or rgb(153,203,187) in RGB space is the tint of greenish cian. It has hue angle of 160.80 degrees, value = 80 and saturation = 25. #99cbbb can be obtained by mixing 3 colors: 1 drop of blue, 1 drop of green, 3 drops of white.
Nearest safe hex - #99cccc. Below you can see the block with #99cbbb color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99cbbb to the mixer and play with it.