Default Tile Colors

Sorry for a noob question, I did search.

I have been working on building out my dashboard in both ST and AT.

AT is looking the best with usability, but I have one item that confuses me.

I am using the elements theme

When I add a door lock, the entire tile is red.

I understand the intents, so I was hoping “green” when locked.  Red when unlocked 

But I can’t seem to get the tile off of “red”.  In fact red isn’t even a theme color.

where did the red come from?

It seems some types of tiles are preset to a specific color.