Thanks, John.
The tiles on the left side are dashboard tiles. They have been turned from square to round by applying a little custom CSS {border-radius: 50%;} to make them look more like buttons.
I try to make the colors meaningful. Normally all tiles have a black background - except the active one will be white. In this photo, the white button at top shows we’re on the Home dashboard.
Why black and white buttons? When I was a child, light switches looked like this:
White was ON and black was OFF.
If a tile is light red (“Motion” and “Batteries” in the photo), that means more information will be found when you press that button. The Motion button opens a dashboard displaying all of the motion detectors so you can tell which one(s) is active. The Batteries button opens a dashboard with all battery levels color-coded. An almost-depleted battery will be the cause of the light red button on the Home dashboard, and will be bright red on the Batteries dashboard.
A bright red tile (the “Alerts” button in this photo) indicates “important”. The Alerts dashboard will indicate the guilty suspect. A water leak or an unlocked door will be the cause, and will show bright red on the Alerts dashboard.
Wordy - it looks like I was trying to write a book!