Currently in JIRA Service Desk, the SLA tracker will add a background color.
According to the documentation: https://confluence.atlassian.com/servicedeskcloud/setting-up-slas-732528967.html

It will add a grey color when the SLA has less than 1 hour remaining. Yellow SLA has less than 30 minutes remaining and red when the SLA has breached the target.

As a Service Desk administrator, I would like to have the ability to change when these background colors will be used, so the Service Desk team can have a better view according to the priority of the requests, for example, set Yellow color when 60 minutes is remaining instead of 30.