In a previous question ( [How do I globally set the text color in XeLaTeX](https://tex.stackexchange.com/questions/26549/how-do-i-globally-set-the-text-color-in-xelatex) ), I've asked how to globally set a text colour in XeLaTeX and got some excellent answers.

However, while the proposed mechanisms seem to work in most cases, they also seem to fail consistently for the colour `white`. I'm not sure if this is a bug or if I'm doing something wrong here, but please consider the following example:

```
\documentclass{report}
\usepackage{xcolor}
\usepackage{fontspec}
\setmainfont[Color=white]{Linux Libertine O}
\setsansfont[Color=white]{Linux Biolinum O}
\setmonofont[Color=white]{Inconsolata}

\pagecolor{darkgray}

\begin{document}
\chapter{A chapter}
\section{A section}
\texttt{Some mono text}
The text above is invisible as it is all black and not white.

{\addfontfeature{Color=yellow} Some yellow text showing up on the dark page.}
{\addfontfeature{Color=white} Some white text invisible on the dark page.}

\end{document}

```

The example follows @AlanMunn s suggestion on the other question. The result is:

![White text is black](https://i.stack.imgur.com/4jpGM.png)

The white text is printed in black. Other colours (like yellow in the example) work well.

If I use @Herbert s suggestion of adding 

```
\AtBeginDocument{\color{white}} 
\addtokomafont{sectioning}{\color{white}} 

```

to the document, I keep stumbling over environments that are still black, like the captions of figures for example. In any case, the `\color` command seems to be stronger than the `fontspec` setting.

Any thoughts or solutions to this?