At start you select one of the 5 colors to be your primary color.
It also means that the initial costs to build some Facilities is based on this.
TIP on Color selection
You should have a color you can use.
For example, if you have mostly yellow fountains around the locations you usually are at, you would benefit from choosing yellow.
If you want to change color you may, but you will loose:
- all buildings and upgrades
- all crystals
- all portals
- not placed transmitters and parts.
If you are thinking about changing, the tip is to do it early.