Why is they purple and how do I get rid of it?

What does it mean being under the component?

To ungroup elements, you can select the group in the Layers panel and use the command “Ctrl + Cmd + G” on Mac or “Ctrl + Alt + G” on Windows. Alternatively, you can choose “Object” in the top menu and select “Ungroup.”

Components are elements you can reuse across your designs. They help to create and manage consistent designs across projects.

You can create components from any layers or objects you’ve designed. These could be a whole range of things like buttons, icons, layouts, and more.

You can grasp overview of Components

Please check out the help center article:

Hope it helps!

Thanks,
Toku