[style]: Improve Color Scheme for Subscribe Section

[akshay0611]

What's the style idea?

Description of Style Idea:

We need to address the inconsistent text colors in the Subscribe Section across different pages. The current design has the following issue:

• Inconsistent text colors between different pages (e.g., finance.html and contact.html).

Suggestions for Improvement:

• Add a consistent color scheme (e.g., #2e2e2e for headings, aligned with the overall theme).

Add screenshots

Current Design (finance.html):

Current Design (contact.html):

Code of Conduct

• I agree to follow this project's Code of Conduct
• I have read the Contributing Guidelines
• I agree to follow this project's Code of Conduct
• I'm a GSSoC'24 contributor
• I want to work on this issue

[github-actions]

👋 Thanks for opening this issue! We appreciate your contribution. Please make sure you’ve provided all the necessary details and screenshots, and don't forget to follow our Guidelines and Code of Conduct. Happy coding! 🚀