View Page: Color alone used to convey information

Issue Summary

Color alone used to convey the presence of an error messages in the modal dialog. 

Steps to Reproduce

1. Navigate to the "Side bar" and activate the page.
2. For example, activate the "Admin Admin" link.
3. Observe that "View page" has been appeared on the page.
4. Navigate to the "Stop watching 'w'" link and activate it.
5. Select "Manage Watchers" option.
6. Observe that "Manage Watchers" modal dialog has been appeared on the page.
7. Add the already added user and check that error is occuring.
8. Check that only color is used to indicate an error mesage.

 Screenshot

Actual Results

The #900 color is used to identify the "Nayan kamble is already watching this space" error message in the modal dialog.
Color deficiencies users and screen reader users will not be able to differentiate between the colors and will have no way to easily identify the currently selected dates.

Expected Results

In the mentioned example along with color, use additional visual cues such as underline, bold, patterns, and so on to convey the state of the selected dates.

In this scenario, provide word "Error" at the start of every error or provide any warning icon for identification.

Workaround

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

Environment

MacBook Pro (16-inch, 2019)
macOS Ventura Version 13.3.1
Chrome - Version 114.0.5735.198 (Official Build) (x86_64)
Firefox- Version 112.0.1 (64-bit)
Safari- Version 16.4 (18615.1.26.11.23)
JAWS- Version 2022
NVDA- Version 2020.3
Voiceover - Version Latest