The division of sites into categories is based on the Cybersecurity Color Wheel

Blue team

https://www.rangeforce.com/

https://blueteamlabs.online/

https://letsdefend.io/

https://cyberdefenders.org/

https://www.malware-traffic-analysis.net/

https://tryhackme.com/

https://www.hackthebox.com/

https://defbox.io/

Red team

https://tryhackme.com/

https://www.hackthebox.com/

https://pentesterlab.com/

https://exploit.education/

https://ctflearn.com/

https://ctf101.org/

https://vulnhub.com/entry/empire-breakout,751/

https://portswigger.net/web-security