You can setup the links hover color for the entire website from the Customizer > General Styling section.
To Change the Color of Links when you Mouse Over
Link hover is a technical term that simply means mouse over a link. So if you notice when you mouse over any link, the color of links usually change. To change the hover color, you need to click on “Select Color” and choose the color of your choice.
When you selected a color, you will be able to hover over any link and see the link changes color exactly to the ones you have chosen. If you like the change you see, you can publish the page to save the changes.