Change color of tiny line above footer area?

And yes, forgot one thing:
How do I change the color of that thin line above the footer area?

Hello there,

I hope you are doing well today.

You can use the following CSS code to change the footer line color by going to Appearance > Customize > Additional CSS and pasting it there.

/*Footer line color*/
footer#colophon {
    border-top-color: green;

Best Regards,