\setuphead[section][textstyle={\setbar[overstrike]},textcolor=blue]

\definehighlight[Whatever][color=darkyellow]
\definehighlight[Delete]  [color=red,style={\setbar[overstrike]}]
\definehighlight[Keep]    [color=green]

\starttext

    \setupbar[overstrike][foregroundcolor=cyan,color=blue]

    \startsection[title={{\green green} foo {\green green}}]

        foo \startbar[overstrike]bar\stopbar

        test  \Delete{test} test \Keep{test} test \Whatever{test} test

        \color[red]{test  \Delete{test} test \Keep{test} test}

    \stopsection

\stoptext
