\setupcolors[state=start]%
\definecolor[ice][r=0.867, g=0.945, b=0.973, s=0.9]%
\starttext
\bTABLE[align=middle,background=color,frame=off]%
\bTR[bottomframe=on]%
\bTH{test1}\eTH%
\bTH{test2}\eTH%
\eTR%
\bTR%
\bTH[rightframe=on]{test1}\eTH%
\bTH{test2}\eTH%
\eTR%
\eTABLE%
\crlf%
\crlf%
\bTABLE[align=middle,background=color,frame=off]%
\bTR[bottomframe=on]%
\bTH{test1}\eTH%
\bTH{test2}\eTH%
\eTR%
\bTR%
\bTH[rightframe=on]{test1}\eTH%
\bTH[backgroundcolor=ice]{test2}\eTH%
\eTR%
\eTABLE%
\crlf%
\crlf%
\bTABLE[align=middle,background=color,frame=off]%
\bTR%
\bTH{test1}\eTH%
\bTH{test2}\eTH%
\eTR%
\bTR[topframe=on]%
\bTH{test1}\eTH%
\bTH[backgroundcolor=ice,leftframe=on]{test2}\eTH%
\eTR%
\eTABLE%
\stoptext%
