Bug: Color inconsistency of theme switcher

[vivekrawat21]

What happened?

The color of the logo of the theme switcher button is differnet from others and onlight mode it is also not looking great

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What browsers are you seeing the problem on?

No response

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• [X] I agree to follow this project's Code of Conduct
• [X] I want to work on this issue

[Saurav-Pant]

Assigned @vivekrawat21