Referencing For CMS - Error!

Hello! I am trying to dynamically style blog feature tag so if its a different tag it’ll be a different color. But when I go into dynamic settings, no color shows up to select.

Here is my public share link: Webflow - New

You would first need to add the necessary fields to you collection and populate with values for each collection item.

I thought I did that when I created the Tags collection and then referencing it in the blog post collection. Is that not the case?