Dear all, as expressed by the title, I have a very strange behaviour between
colors and figures. Here is the example :
\setupcolors[state=start]
\definecolor[gris][r=0.310,g=0.333,b=0.341]

\starttext
  \placefigure{}{\externalfigure[myfigure]}
  \color[gris]{\tfd Some text}
\stoptext

If myfigure is a PDF file, everything is ok with MKII, MKIV and XeTeX. If
myfigure is a PNG file with transparency, then the "gris" color is ok with
MKII but not with MKIV and XeTeX if the resulting document is read with
Adobe Reader on Linux (when read with evince, colors are ok !!!!!). In the
latter case, the "gris" color is very dark close to black and the green of
myfigure becomes flashy...
Quite puzzling !

-- 
Flavien.
----------------------------
"Quantum objects are completely crazy but, at least, they are all crazy in
the same way." R.P. Feynman.