How can I change the cookie banner color and button text?

Hello everyone,

I am using the Iubenda cookie banner on my WordPress site.
I would like to change the banner background color to blue.
I also want to edit the “Accept” button text to say “Agree”.

I tried adding CSS in my theme’s style.css, but it did not work.
Can someone please show me the correct code or settings?

Thank you for your help!