Primary Color

At start you select one of the 5 colors to be your primary color.

This means that you spawn Workers in that color and may have unlimited amount of Workers in that color. It also means that the inital costs to build some Facilities is based on this.

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 everything (except already placed Transmitters and fulfilled Missions). If you are thinking about changing, the tip is to do it early.