The colorblind simulator only works if you have normal vision. Is there a color corrector simulator for certain types of colorblindness? e.g. Show colorblind people what the colors look like to the normal viewer.
Sounds absolutely impossible to me (having protanopia).
For that matter, unless someone either goes from normal to colourblind, or colourblind to not, is it actually possible to ever do this? Assuming the transformation isn't possible... how do you describe "red" to someone who can't see "red"? Even if you find the exact colour that, for a colourblind person looks like "red", how do you know you've found it, how does the colourblind person know?