In the Zone Lookup configurable app, I can turn the map pin on/off but I can't control anything else about it, including color. I checked with Esri Support about this issue and they made several suggestions like changing the basemap to something that contrasts more with the map pin or downloading the app and changing the code.
Changing the color or symbology of the map pin would make the application easier and more flexible for designers to control the look and feel of their application. The same could be said about the color, font, and size of the map pin label that's added.
