My question wasn't too obvious, as I don't know how I could ask it.

Basically, I have a simple problem. I would like to make a table of contents. I think, it wouldn't be a big problem, but since I use different colours, I would like to change the basic hyperlink style. Here is a picture of my document:



I have could manage to change the standard hyperlink style, but I cannot change the visited hyperlink stlye. I have tried everything which I found online. I simply want my text to stay the same befor visit the link and of course after visit the link. I don't want to see any changes, but I don't know how I could do that.



I hope, it was understandable, (because I am just learning the language). I really have to deal with this problem as soon as possible and I don't want to make any compromises.