IIRC the peasant housing is just dirty wood on top of dirty white stone. I would have to reread the first novels to check but I don’t think that Miya Kazuki would leave such an obvious error when everything else is so meticulously planned and crafted.

And apart from some real heavy hitters in the fantasy genre I don’t know many better than Bookworm in terms of details for the given scope of the series. This is an intimate story on a relatively small scale and not some globe spanning, end of the world epic. it has a unique and detailed magic system, unique and detailed class system, religious systems with their own pantheon that has his own individual story, unique and detailed political systems that don’t flip flop whenever it’s convenient for the direction the author wants to take. Systems that become important later on being introduced to the plot and explained 20 volumes earlier. Stuff like that is what makes me lose myself in a story. If there are some minor things that could be pointed out like people not inventing pancakes then that’s something that I can look past.

I think in the Anime the houses are made more colourful to give more visual effects. I don’t remember paint or colour being mentioned in the LN apart from possibly the North of the city where the guilds and Bennos Store is. (The rich part)

The Pancakes / Parucakes were because the parufruits husks were used for bird feed as there was no taste. It’s because of Mynes knowledge that she combined the tasteless husks with the liquid to make a tasty food. As sugar is expensive there is only Paru fruits to use as sweetener, They also only come rarely in winter so it is not a common food.