Why is the Australian flag sometimes red?

Related questions

1. Why do New Zealand and Australia have the same flag?
2. What do the colors on the Australian flag mean?
3. Why does Australian flag have Union Jack?
4. What does the Southern Cross symbolize?
5. How did Australia get their flag?
6. What flag did Australia fight under in ww1?
7. Should Australia have a new flag?
8. Why is there the British flag on the upper left corner Australia?
9. What do the 5 stars on the Australian flag represent?
10. Is Australia a British colony?

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2. #national
3. #symbol
4. #became
5. #vacuum
6. #first
7. #which
8. #australian
9. #meant
10. #civil
11. #anyone
12. #other
13. #official
14. #public
15. #wanted
16. #facto
17. #australia
18. #officially
19. #people
20. #ensign