Groups: Pop-up non-differentiable in high contrast mode

Issue Summary

The "Profile" pop-up is not able to differentiate with the main page background.

Steps to Reproduce

1. Open the "Groups" page.
2. Turn ON the high contrast mode.
3. Navigate to the mentioned instance.
4. Observe that the "Profile popup" is not easily distinguishable.

Screenshot

Actual Results

When the user navigate and activate the "Profile" button in the header section, the background of the expanded popup such as "My profile", "Atlassian marketplace" and "Logout" and the main page background in not distinguishable.

As a result, low vision users are finding difficult to understand the structure of the page.

Expected Results

The low vision users should be able to differentiate the popup with the main page.

Provide a border to the popup in the high contrast mode by using CSS. 

Workaround

Currently there is no known workaround for this behaviour. A workaround will be added here when available.

Environment

MacBook Pro (16-inch, 2021)
macOs Sonoma 14.2
Chrome - Version 120.0.6099.109 (Official Build) (arm64)
Firefox- Version 92.0 (64-bit) 
Safari- Version 17.0 (19616.1.27.211.1)
JAWS- Version 2023
NVDA- Version 2021.2 
Voiceover - Version Latest