Its blue?

So.... I was thinking..... why is dandruff shampoo always blue? I mean what does the color have to do with the effectivness of the product? of course I could drink bright green coke or something... but im not sure that i would like the idea of doing so... you know how it is... that brown liquid just looks ore refreshing ans appitizing... ;o) lol or maybe not.. ok well the has been my reintegration into the bloggin world.. i will probly be seeing more of you bloggers freaking in the near future... Loves