From http://www.mail-archive.com/ntg-context@ntg.nl/msg44867.html it appears that \setupinteraction affects the \setupurl command when no url is given. This was not obvious from the documentation . It seems that assigning different colours for internal (e.g., cross-references, table of contents, and indexes) vs. external links (e.g., web sites) is not possible without creating new macros that use the \colormacro? Kind regards.