The article even states: "Don't set the colors at all, let the browser use the system default color". That’s just one of three options. Setting “both the backg

The article even states: "Don't set the colors at all, let the browser use the system default color". That’s just one of three options. Setting “both the background color AND font color” is another. Also, the third option might give you a hint that the author’s tongue is in their cheek.