Comment by Theodores

I like your thinking. I want to apply it to my own writing, as in rendered HTML rather than code.

As an example, imagine writing an eyewitness report about something that happened. There are facts that can be backed up with primary sources, then there is one's own hearsay. The hearsay might be important for telling the whole story, however, it is only hearsay. It has less value than something that can be proven with other sources. So maybe there is a suitable colour for that.

I can mark up my HTML with articles, sections, asides and the rest of it, so that everything is very well structured, and yet none of that is visible - I might as well go for a 'sea of divs'. If I mark HTML up with classes, for example 'hearsay', then I can use that to do some colour things.

Where I speculate or advance a hypothesis, I can use different colours again.

Same with too much detail, I can put that in a colour that can make it easier for the reader to skip, furthermore, I can put that behind details/summary elements.

I need not tell the reader what the significance of the colours amounts to, however, if done well, it can be made to work without the reader knowing why, or needing to care about that. There is going to be an art to this, and pulling it off will require work, but I think it is fully doable.

I had best get busy!