My campaign links are in blue

When a text becomes a link by adding the URL, by default, it turns blue. To change the colour, once the link has been added, you will have to assign the colour you want from the text editor. To do this, select the link and change the colour from the following icon:

If you also want to remove the blue underline, see how to do it from the following support article "How to remove the blue underline from a link".