However, if I had an unusually large window that didn't take standard curtains, then I'd provide the window treatment and choose a basic neutral color.

You can also put some food coloring in the toilet tank and let it sit.

We'll have had what seems like a valuable conversation, and then they will ask what color house I prefer, or what the "1% rule" is, or if I prefer wood/metal fences.

We also always use a dark colored grout.

Technically, under this scenario, the vent does not appear to constitute a "structural" change, it may also not constitute a change to the exterior (it depends on what the HOA guidelines say), most of the time an exterior change has to do with adding/deleting doors, windows, and changing the  facade and color.   

Had seen it online on a different type of siding, with that exact color combo of white, blue, yellow door and looked much better.

The dark and light colors from the age of the wood look great with a little wear and tear.

Things as simple as a front door, double pane glass, paint colors, type of paint etc all come into play.

You might be able to change the color by reglazing with out ripping out and replacing.

Maybe if the tenants do not like the carpet color they will be more inclined to accept a tenant buy out.I will provide two examples but my non-rent controlled example will be San Diego market (not LA) because I know the San Diego market better and therefore already know the aver rent increase of a San Diego SFR.