[johncoltrane]

It has been working for decades and I would rather have it keep working for decades to come.

What would be optimal is semantic _styles_ (not colors):

- The developer marks the string "XXX" as an error message without even trying to style it.

- The platform/user agent/terminal/whatever displays the string in the default style for "error".

- The user can adjust the theme of their platform/user agent/terminal/whatever to fit their needs/wants.

[xvilka]

Semantic styles limit the use - not all interfaces need e.g. "error" context. Take, for example, Task Warrior interface. There is no place for the "error" semantics in it. But there's a place for "critical task" semantics, which is usually also some shade of red.