\nopdfcompression

\setupinteraction[state=start]

\definepushbutton [reset]

\startuniqueMPgraphic{whatever}{color}
    fill fullcircle xysized (OverlayWidth,OverlayHeight) withcolor \MPvar{color} ;
\stopuniqueMPgraphic

\definepushsymbol [reset] [n] [\uniqueMPgraphic{whatever}{color=red}]
\definepushsymbol [reset] [r] [\uniqueMPgraphic{whatever}{color=green}]
\definepushsymbol [reset] [d] [\uniqueMPgraphic{whatever}{color=blue}]

\starttext

    \startTEXpage[offset=10pt]
        \pushbutton [reset] [page(2)]
    \stopTEXpage

    \startTEXpage[offset=10pt]
        \pushbutton [reset] [page(1)]
    \stopTEXpage

\stoptext
