Slightly off topic... UK road signs have a very clear and consistent color scheme based on the category of road. E.g., blue background for motorways, green back

Slightly off topic... UK road signs have a very clear and consistent color scheme based on the category of road. E.g., blue background for motorways, green background for A roads. This scheme was (maybe still is) reflected in the color of roads on printed maps. Google Maps also used this scheme some years ago. I understand their reasoning, but the day Google standardized on the current yellow & white scheme was a sad day for this UK Maps user.