[NTG-context] unwanted rgb-->gray conversion (mkiv)

Hi Hans, The attached example works fine with mkii (text and gfx both use RGB colors). Using mkiv reduces the colorspace of the graphic to GRAY. Sadly PDFX/-4 doesn't allow to mix color profiles of colorspace RGB with GRAY ones. So I'm forced to always use the RGB colorspace... Best wishes, Peter \setupcolors[state=start] \definecolor[rgbgray] [r=.5,g=.5,b=.5] \startuniqueMPgraphic{foo}{size} fill unitsquare xyscaled(\MPvar{size},\MPvar{size}) withcolor \MPcolor{rgbgray}; \stopuniqueMPgraphic \starttext \uniqueMPgraphic{foo}{size=5cm} \color[rgbgray] Gray text. \stoptext