simulated co2 sensor - highlighting

Hi,

I've created a simulated CO2 sensor DH (basically by butchering the simulated temperature sensor DH). This allows me to display a number in a tile without an associated unit (like degrees or %)

Is there any way I can set this so that at a certain value, ActionTiles can tell this is a warning condition and change the tile colour accordingly?

Put another way, how does actiontiles know when other DHs are in alert conditions?

Use case: I'm trying to create a summaries tab that tells me how many doors/windows  are open and how many lights are on and various other summaries so that I can have one sheet which gives me an overview of the whole house. (Summarising is being done in webcore). - so if there's one or more windows open I'd like actiontiles to highlight the tile.

I realise mine is likely an uncommon use case - but surely with any environmental monitor it would be useful to move into alert status once a monitor hits a specific high or low value?

Thanks