\setupcolors[state=start]
\setupinteraction[state=start]

\starttext

\definesymbol[no][]
\definefield[check-me][check][setup3][yes,no][no]
\setupfield[setup3][n=1024,width=2cm,height=2cm,rulethickness=3pt,corner=round,framecolor=red]

\field[check-me]


\stoptext