Hex #99efaa or rgb(153,239,170) in RGB space is the tint of bluish green. It has hue angle of 131.86 degrees, value = 94 and saturation = 36. #99efaa can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of cyan, 1 drop of green, 5 drops of white.
Nearest safe hex - #99ff99. Below you can see the block with #99efaa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99efaa to the mixer and play with it.