Yeah so as explained, there is a website where it explains all the color codes available. (Prior to @Ironnose’s thread.) In order to make a colored text, you must do & &, take note of that. The first symbol is in recognition of the actual color, (blue red etc.) The second symbol is in regards of a layout or extra necessities. This could be making the text bold, underlining or crossing out.
Also, if you have created a clan newly within 3 days prior, it will give you that message as the clan has started a new piece of code, starting a 3d timer. If you have already changed the tag, you also have to wait another 3d.
I hope this helped in any way and enjoy your day!,
Bearaddo 