how do I get colorful references

I hope this email finds you in good health.

Please kindly see the following link: LaTeX referencing colorful numbering

I have also the mentioned problem in part 1. Unfortunately, I could not solve my problem by using your answer. Can I request you send me a ready sample file including the required command in section Answers? I have download hyperref package but I don't know how it works.

Hope to hear from you soon