Add Darkmode to ContactUs page

[rupal11]

Closes: #[issue number that will be closed through this PR]

330

Describe the changes you've made

Changed the color scheme of contact us page and added darkmode.

Type of change

What sort of change have you made:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ x] New feature (non-breaking change which adds functionality)
• [ ] Code style update (formatting, local variables)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Mention any unusual behaviour of your code (Write NA if not)

Na

Checklist:

• [x ] My code follows the guidelines of this project.
• [x ] I have performed a self-review of my own code.
• [ ] I have commented my code, particularly whereever it was hard to understand.
• [ ] My changes generate no new warnings.
• [ ] Any dependent changes have been merged and published in downstream modules.

[adarshvulli]

hey @rupal11, everything is good. I was hoping you could reduce the contrast or may choose a liter version of the pink or change it to a brown color

[rupal11]

1.

2.

Which of the two did you like the most?

[adarshvulli]

Which of the two did you like the most?

Let's go with 2 @ankitapuri your views

[rupal11]

Should I apply the change?

[ankitapuri]

Should I apply the change?

yes go ahead

[rupal11]

Done.