Color is not prominent in notifications while using dark mode

Issue Summary

The changes are usually associated with green and red color indicators in the notification emails. While accessing email notifications through Microsoft Outlook while in dark mode, these colours are not prominent, which makes it difficult to distinguish the highlighted areas that was modified or updated when reviewing this through the mobile device.

Steps to Reproduce

Make any updates or edits to the existing Confluence page and the subscribed user will see the notification similar to the one below:

Expected Results

Notification to be clearer and making it easy to understand the changes.

Actual Results

It is difficult to distinguish the changes.