MS teams notification (or windows default notification)

Hey there team, 

Not sure if this is a possibility - I have trawled many MS documents and panels but have yet to uncover any information. Essentially, my ask is - is there anyway to change the standard MS teams purple notification box to be another customised colour? And if so, can that be done for a specific team/channel? 

The reason for this in particular is so the message (be it a power automated or standard teams message) has a visual point of difference. 

Is this possible at all? 

Thanks in advance