I have the following Emacs Muse snippet:
<src lang="cc">
int a = 1;
</src>
This "htmlizes" the code within the angle brackets (adding color to keywords, etc.). The problem is that my font faces are optimized for a black Emacs background. How can I tell Muse to output the code over a black background?
This is really not problem of Muse, but of htmlize package. It looks for
face-backgroundproperty of given face, so you need to check, which background is set fordefaultface and forfont-lock-*faces… Please, check also htmlize’s version