If you want to change the color globally like pagination button, text color, etc then for this follow the below steps:
You will find this option in the WordPress Dashboard -> Navigate to AMP Option Panel ->Design -> Global -> Select the color/ colour of the Global Color Schema and then click on the “Save Changes” button.

Global Color Scheme: In this field choose the color you want to make a global color scheme and then click on the “Save Changes” button.
The output of the change the Global Color Scheme in AMP

That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions, then please share them in the comments section below.