[FEATURE] Accessibility Improvement of website

[aakankshabhende]

Why do we need this improvement?

Currently, the website accessibility score is 93. By improving the colour contrast ratio and styling, we can achieve a 100 score.

How will this change help?

We need to be highly accessible for a better user experience.

Screenshots

How could it be implemented/designed?

Relates to #3186

🚧 Breaking changes

No

👀 Have you checked for similar open issues?

• I checked and didn't find a similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue?

Yes I am willing to submit a PR!

[github-actions]

Welcome to AsyncAPI. Thanks a lot for reporting your first issue. Please check out our contributors guide and the instructions about a basic recommended setup useful for opening a pull request.
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[aakankshabhende]

@akshatnema I want to work on this issue. Could you please assign me this?