How do you know the meaning of colors on flags?

Answer by  SpaceMunkee (245)

Generally it varies from flag to flag; you'd need to look them up individually. If you want the general guidelines, consult a Heraldic or Heraldy resource.

Answer by  Thomas75 (11)

This is the kind of thing I would look on Wikipedia. It is available in virtually any language I can imagine, and provides accurate and reliable information on these things, because the articles on nation-states are most likely well-edited.