Hex #ff66aa or rgb(255,102,170) in RGB space is the tint of scarlet. It has hue angle of 333.33 degrees, value = 100 and saturation = 60. #ff66aa can be obtained by mixing 3 colors: 1 drop of red, 2 drops of magenta, 2 drops of white.
Nearest safe hex - #ff6699. Below you can see the block with #ff66aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #ff66aa to the mixer and play with it.