Mail colors

You're referring to the colors of the flags of countries!

Here's a list of the first 26 countries of the alphabet, along with their flag colors:

1. Australia - Blue, Red, and White
2. Belgium - Black, Yellow, and Red
3. Canada - Red and White
4. China - Red
5. Denmark - Red and White
6. Egypt - Red, White, and Black
7. France - Blue, White, and Red
8. Germany - Black, Red, and Gold
9. Greece - Blue and White
10. Hungary - Red, White, and Green
11. India - Saffron, White, and Green
12. Italy - Green, White, and Red
13. Japan - White and Red
14. Mexico - Red, White, and Green
15. Netherlands - Red, White, and Blue
16. Norway - Red, White, and Blue
17. Pakistan - Green and White
18. Russia - White, Blue, and Red
19. South Africa - Red, White, and Blue
20. Spain - Red and Yellow
21. Sweden - Blue and Yellow
22. Switzerland - Red and White
23. Turkey - Red and White
24. United Kingdom - Red, White, and Blue
25. United States - Red, White, and Blue
26. Vietnam - Red and Gold

Note that some countries have more than three colors on their flags, but I've only listed the primary colors.