Color-coding is the best way to show associations between goals: it’s visual and very direct. For absolute clarity about each color actually means, add labels to your goal colors – labeled colors and their meanings appear in a Legend at the foot of the screen.
This is especially valuable in shared goalscapes: everyone can immediately see the meaning of each color, which improves understanding and communication.
You can also filter your goals by color in the Focus panel.
To learn more about how it works, watch this video: