\defineframed[framedclass][
	foregroundcolor=black,	foregroundstyle=\bfa,
	backgroundcolor=darkgray, background=color,
	backgroundoffset=1mm,
	backgroundcorner=round, backgroundradius=1mm,
	frame=on, framecolor=black,
]

\definelayer[foo][width=\the\paperwidth, height=\the\paperheight, state=repeat]
\setlayer[foo][x=70mm, y=40mm]
	{\framedclass{no style here}}

\setupbackgrounds[paper][background={foo}]


\starttext
\framedclass{works fine}
\setlayer[foo][x=40mm, y=70mm]
	{\framedclass{no background here}}
\stoptext