[Feature Enhancement] Dark Mode for Blog Page (GSSoC'23)

**Is your feature request related to a problem? Please describe.**
The problem is that the blog page of a website is currently in white mode and not compatible with dark mode. The navbar, changes to dark mode but the background of the blog page doesn't.

**Describe the solution you'd like**
I would like the blog page of the website to be compatible with dark mode. This means changing the background color and font color of the blog page to a dark color that is suitable for viewing in dark mode.

**Describe alternatives you've considered**
One alternative solution would be to manually change the background color of the blog page to a dark color using custom CSS styles. Another alternative would be to use a CSS framework or library that provides built-in support for dark mode and can easily apply the necessary styles to the blog page.

**Additional context**
Dark Mode only changes the Navbar color

@akshitagupta15june Kindly assign this issue to me for gssoc'23!