When using e.g. the Cobalt color scheme the default colors for highlighting warnings (like unreferenced labels) make the text unreadable (white text on cream background).
Previous versions of the LaTeX Plugin allowed changes to the used highlight colors. Another way of of fixing this would be a white on dark scheme support for the highlighting by the LaTeX Pluging.

Steps to reproduce:
- Turn Color mode of gedit to Cobalt
- Open a LaTeX file
- Insert "\label{xyz}" within \begin{document}...\end{document}
- Save the document

Result:
- Label Name "{xyz}" is unreadable (white text on light yellow background)

Expected Result:
- Label Name "{xyz}" is readable (e.g. white text on dark yellow background)