Error: Dark mode enhancement

[saumyayadav25]

Describe the Error

In dark mode, placeholder text is not clearly visible
In footer, black heading is not visible in dark mode in any of the pages.

Expected behavior

Lighter color should be used in dark mode for better visibility.

Additional context

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[github-actions]

Thank you for creating this issue! 🎉 We'll look into it asap and assign you based on FCFS -[ ] In the meantime, please make sure to Join recode org Invite link-[ ] The main code file is located in gh-pages branch -[ ] Watch the complete youtube GitHub Tutorial Your contributions are highly appreciated! 😊 Don't forgot to follow me @sanjay-kv

[snehaamujri]

@sanjay-kv assign this issue to me I am interested, under gssoc extd and hacktoberfest

[leocodeio]

@sanjay-kv assign this issue to me, want to work up on gssoc extd and hacktoberfest

[himasnhu018]

I would like to contribute on this as i am good full stack developer. please assign me that issue.