What I get in that case is 23 cm for the darkish blue left sidebar and 36 cm for the light blue right area that contains the article. Within that right area, the article is in 19 cm white rectangle with just under 2 cm margins.
So, starting from the left here is what I see:
15 cm empty dark blue background,
6 cm of sidebar text on dark blue background,
2 more cm of empty dark blue background,
2 cm of empty light blue background,
A tad under 2 cm of empty white background,
About 14.5 cm of text on white background,
A tad under 2 cm of empty white background,
15.5 cm of empty light blue background.
It really is quite ugly. It looks like something I would do because I completely suck at CSS.
1 The exception being browser windows to run sites like Netflix where I'm really using it as a video interface.