Pagination loses its default page mark when adding a button color or button text color

[andeng1106]

Describe the bug Default button color of where the page is: White Default button text color of where the page is: Blue

But when adding a button color and button text color, it might be confusing to users on which page they're at since all the page buttons has the same button colors and text colors.

Note: This issue also happens on WordPress 5.9 but it might be nice to fix this.

To Reproduce Steps to reproduce the behavior:

1. Add posts block
2. Add a pagination block inside
3. Observe default color for button and text
4. In Style > Button Colors, change Button Color and Text Color
5. Update changes and view page or Preview in new tab
6. Try to change pages by clicking page numbers or Prev/Next buttons
7. Check if the button color and text looks confusing unlike the default one

Expected behavior When a button/page is selected, that button should have a default color and text (e.g. button is white, text is blue)

Screenshots

https://user-images.githubusercontent.com/103395655/168505353-e0c46af0-f196-441c-b85d-652ad6620731.mp4