Changing a font with css can be a task, especially with dolphin/orca. There are so many css files, and then through in dolphin has a base template css directory and a tmpl_name css directory. Then through in orca's css on top of that not to mention there are some in groups related to orca.

At any rate, make sure you are editing the right area of the css for what you are trying to accomplish. Sometimes you have to try a number of areas and see if you got it right.

Orca is a little confusing see more to begin with. And it depends on what font area in particular you are trying to change. If messing with the background if you have a picture/img background it might be over-ridding the color change. The main dolphin general.css could be doing the same.

I just spent about an hour changing font colors, sizes, styles, etc in orca. Part of the time was due to recompile "en" after each to check the changes. It worked out, but it was a little time consuming.