Hi,

The trick does seem to be that a new macro is required.

% External link colours
\definecolor[steelblue][h=4682B4]
\define[2]\href{%
  \begingroup
    \setupinteraction[
      style=normal,
      color=steelblue,
    ]%
    \goto{#1}[url(#2)]%
  \endgroup%
}

See attached.

Kindest regards.