New Landing Page Thank you page hyperlink hover color

I created a thank you page built into a landing page that I created. I inserted a hyperlink in there to link to an external URL, and it only gives me the option to change the color of the text when not hovered over with the mouse. I chose white. When I hover over it, it’s choosing an ugly purple color. The problem is that the block that i’m typing it in has a dark blue background, so it’s barely visible. Please add the ability to change the hyperlink hover color!