UI Issue: Colour of Links and Text the Same

Can you please share the screenshot of which link you want to change the color?

I want to change the colour of all links within posts. Right now, the text is black, and so is every single link on the page. And I have found no way of changing this option.

There are three options for change color themes.
Like this: https://prnt.sc/tk2dwl
Please enable the Global color scheme option and Hover color scheme option on your page?
AMP-> Design-> Global

For reference follow this tutorial: https://ampforwp.com/tutorials/article/how-to-change-the-global-color-scheme-in-amp/