Hello, I am having problems including 16-bit png files in ConTeXt. In the following example, red.png is a 800x600 image of red pixels. The resulting test.pdf shows a BLACK rectangle. (The same problem exists with real images.) However, I can produce the desired result with my installation under pdflatex... $ cat test.tex \starttext \externalfigure[red][width=\textwidth] \stoptext $ file red.png red.png: PNG image data, 800 x 600, 16-bit/color RGB, non-interlaced $ texexec test $ cat test2.tex \documentclass{article} \usepackage{graphicx} \begin{document} \includegraphics[width=\textwidth]{red} \end{document} $ pdflatex test2 My distribution (debian + texlive) uses This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6) in both cases. Does this have something to do with \pdfimagehicolor? Thank you