Is it possible to have different color in between a specific patterns?

Question

I am using \begin{comment} hello world \end{comment} in order to comment out text in AucTex mode.

In general I am using different color for comments but when I use \begin{comment} [text] \end{comment}, the text in between them shows up as white (normal text color). I want it to be seen as in original comment color.

(setq LaTeX-item-indent 0)
(add-hook 'LaTeX-mode-hook 'turn-on-auto-fill)
(require 'tex)

(add-hook 'LaTeX-mode-hook (lambda ()
  (TeX-global-PDF-mode t)
  ))

General question: Is it possible to have different color in between a specific pattern?

Narrowed question: How can I have different color in auxtex for text for all kind of comments such as in between \begin{comment} and \end{comment}

Answer 1

This should be automatic if you have \usepackage{comment} or \usepackage{verbatim} in your preamble. At the time the question was asked, it was actually automatic only with \usepackage{comment}, but AUCTeX 12.3 onwards will do it for \usepackage{verbatim} as well.

If you've just added the \usepackage command, run TeX-normal-mode (C-c C-n) to tell AUCTeX to parse the preamble again.

More generally, if you define your own environments using a LaTeX package that AUCTeX doesn't know about, you can ask AUCTeX to parse the .sty file. See automatic customization. As a last resort, if your LaTeX code is too complex for AUCTeX to parse, write your own style support. You can look at style/comment.el in the AUCTeX distribution to see how the {comment} environment from the comment.sty package is declared: it adds an entries to font-latex-syntactic-keywords-extra, which is used to override syntax information to declare \begin{comment} as having comment-start syntax and \end{comment} as having comment-end syntax.