A family of Microsoft on-premises document management and storage systems.
Hi @ITDept ,
Per my test, you could use Calendars Overlay feature to color different users.
1.Calendar List Settings > click category column > change the column name and type your users' name.

2.Create custom calendar view for each user name.
Create View > Start from an existing view "Calendar" > type user name in view name > Filter > Show items only when the following is true > select "Person Name"+"is equal to"+user name > repeat the process for each user name.

3.modify default SharePoint calendar view > Filter > Show items only when the following is true > select "Person Name"+"is equal to"+Black

4.Create Calendar overlay
Calendar overlay > New Calendar > select list and list view

Note: When you new item remember select user name.
My test result:

Do you want to delete sites in SharePoint online or SharePoint server?
1.SharePoint online:
Microsoft 365 admin center > SharePoint admin center > Sites > Active sites
2.SharePoint server:
Settings > Site settings > Site Action > Delete this site
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