[FEAT]: Adding the background to navbar

[GAVINESHWAR]

Description

There is no background color or effects to it , I would like to add the matching effective background to it make better user interface.

Actual Behavior

There is an transparent background for the navbar.

Expected Behavior

Adding the effective navbar to the website make it better user interface.

Please describe what you expected to happen.

Steps to Reproduce (if applicable)

1. Step 1
2. Step 2
3. Step 3

Screenshots (if applicable)

Actual:
(screenshot)

Expected (highlight the part that requires changes):
(screenshot)
Changing the transparent background to colorful.

@itsmohit097 assign me this issue make contribution to the project.