Taking a guideline for prose and misapplying it to code does not result in a meaningful insight. Just look at non-prose typeset works such dictionaries, we ofte

Taking a guideline for prose and misapplying it to code does not result in a meaningful insight. Just look at non-prose typeset works such dictionaries, we often see a selection of different font styles there to help the reader scan non-linearly. Look also at newspapers, again we see different font styles, sizes and weights to help the user navigate a page. Look at the references section of an academic paper - you'll find bold italic and underline all used on the same line. Color is very expensive to use in printing prose and so is generally not used, but in handwritten medieval documents color was often used: https://en.m.wikipedia.org/wiki/Rubric https://en.m.wikipedia.org/wiki/Rubric Also this claim isn't even correct - code which varies in color is not changing typeface! Really it's no different from using bold or italic in traditional prose, which nobody would complain about.