Why did Mace Windu have a purple lightsaber?

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Tags

1. #requested
2. #aware
3. #depicted
4. #windu
5. #jackson
6. #lucas
7. #movie
8. #would
9. #samuel
10. #green
11. #became
12. #seldom
13. #lightsaber
14. #accommodated
15. #because
16. #character
17. #unique
18. #first
19. #purple
20. #onscreen