Function dim 

pub fn dim(text: &str, mode: ColorMode) -> String

ColorMode, Role, color_of, paint and dim moved to headwater_check::paint, and are re-exported here unchanged.

Finding::render, Run::render, explain’s renderer and the two sweep renderers all need them and none of the three crates that declare those functions may depend on headwater-cli, so the types live where every caller can reach them — see the module comment of engine/crates/check/src/paint.rs for the full reasoning. What stays here is stdout_color and stderr_color: the one fact only this crate holds, which stream this process is attached to. Dim weight, the one part of the Plain fallback that is not color.