Pagination color is not changing on the WordPress website

Pagination color, and other design elements, are controlled by your theme, not WordPress.

What is the name of the theme you’re using?

Nevermind, I see you added the site to your profile here.

In this case, I recommend asking at https://www.ads-software.com/support/theme/kadence/ so the theme’s designers and support community can help you with this.

I am using kadence theme and there is no option finding in kadence theme regarding pagination colors.

Then it would require some customization of the theme with CSS, so I recommend asking at https://www.ads-software.com/support/theme/kadence/?so the theme’s designers and support community can help you with this.