White Label - Document word]: In high contrast Aquatic mode, luminosity contrast ratio of keyboard focus indicator of controls present under video is less than 3:1

Is it an issue related to Adaptive Cards?

No.

What is the PWD impact?

In High Contrast Aquatic mode, a low-contrast keyboard focus indicator makes it difficult for users with low vision or keyboard-only users to see which video control is active, leading to confusion, slower interaction, and potential errors, and creating an exclusionary experience.

What browsers and screen readers do this issue affect?

Windows: Edge with Windows Narrator

Are there any code-based customization done to Web Chat?

No, I am using Web Chat without any customizations except "styleOptions".

What version of Web Chat are you using?

Latest production

Which area does this issue affect?

Forced colors (high contrast mode)

What is the public URL for the website?

No response

How to reproduce the issue?

Prerequisites:
Settings>Accessibility>Contrast themes>Aquatic/theme>Refresh/Reopen the application.

Repro Steps:

1. Open URL: https://compulim.github.io/webchat-loader/ and sign in using valid credentials.
2. Navigate to web chat page and select 4.18.1-main.20240927.ea7a875 (30/9/2024) version and then select mockBot link under present label and then select open web chat in new window link at bottom.
   3.Navigate to white label experience chat page and type Video vimeo word in type your message text box.
   4.Navigate to the search results.
   5.Navigate on the video controls.
   6.Verify that in high contrast Aquatic mode, luminosity contrast ratio of keyboard focus indicator of controls present under video is less than 3:1

What do you expect?

In High Contrast Aquatic mode, the keyboard focus indicator for video controls should be clearly visible with a minimum 3:1 contrast ratio, allowing users to easily identify the focused control and navigate the interface effectively.

What actually happened?

In high contrast Aquatic mode, luminosity contrast ratio of keyboard focus indicator of controls present under video is less than 3:1

Do you have any screenshots or recordings to repro the issue?

Did you find any DOM elements that might have caused the issue?

No response

MAS reference

No response

WCAG reference

No response

WAI-ARIA reference

No response

Adaptive Card JSON

Additional context

No response

Start by reproducing the issue through the webchat-loader using the listed Web Chat version, Windows Edge, and the Aquatic contrast theme. Inspect the video controls and their keyboard-focus styling under forced colors, with styleOptions as the only reported customization. Done means the focused controls have a clearly visible indicator meeting the stated 3:1 contrast ratio.