It's probably already changed in the past years

The Guardian's website has changed very little since 2015 or so[0]. The logo, fonts, and colour palette have evolved in 2018, but the structure, grid, or even the category colours (orange for opinion, blue for sport, etc.) have not changed at all.

[0] https://web.archive.org/web/20150131232757/http://www.thegua...