First 3 Lessons in Introduction to Basic CSS not working

Hey, i just wanted to inform you that the first lessons where you have to change the color of the h-element not works. I even copy pasted the solotuin but the programm just dont sees red. After that the font-size lessons works fine.

do you have a dark mode extension installed? that would change the colors and make the tests see a different color. You can switch on the native dark mode in the settings

What browser are you using? Do you have any extensions installed?

Yes the dark mode was the reason. Thank you