Add more Color themes

[PriyalPatney]

Add more color theme options and make it easy to switch between them.

[max-programming]

Maybe we can use the colors that are built-in to Material UI. And use them as our accent colors. How about that?

[PriyalPatney]

Seems good to me, can you assign me this issue? 👍🏻

[max-programming]

Sure @PriyalPatney.