Once again, what is your batch size?
2T of clay per 100 grams of oil and 2T of clay per 1,000 grams of oil are very different ratios.
Also, if your soap is not gelled, it's going to mute the Mica, and adding TD or Kaolin clay will make it even worse. Pink becomes light pink, light pink becomes pastel pink, pastel pink becomes white. So, if you're using a lot of white clay or TD and a light purple Mica, you will likely get mostly white. Gelling your soaps can darken the Mica, but it can also darken the natural color of your soap.
Again, what color is your uncolored soap? The reason I keep asking is because if it is naturally yellow, it will always cancel out purple, causing it to appear grey to some degree. Using a brighter purple and zero clay or TD may counteract it slightly, but if you want a true purple there is no substitute for using refined oils or butters that result by themselves in a nearly white soap.