[🐛 Bug]: Accessibility issue with color contrast on homepage

[StephNathai]

What happened?

Link: https://www.selenium.dev/
Issue: on the Selenium homepage (and throughout the website as well), there is an accessibility issue where the elements don't meet the minimum color contrast ratio. This causes the content on the page to be hard to read for various users.

What browsers and operating systems are you seeing the problem on?

Chrome using axeDevTools Chrome extension to scan for accessibility issues.

Screenshot of accessibility scan

[github-actions]

@StephNathai, thank you for creating this issue. We will troubleshoot it as soon as we can.

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