# How to color diacritical marks?

I would like to have the diacritical marks stand out visually by being colored differently. For example, can I have â in which the circumflex is in red, and the 'a' is in black? When I use \textcolor{...} for the diacritical mark, it is not placed correctly over (or under) the letter.

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## migrated from stackoverflow.comFeb 7 '13 at 16:03

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The main problem is when you use a T1 encoded font, in which accented chars are no longer composed by overimposing the diacritic on a "unaccented" char, but instead they are a new glyph which includes the diacritic as part of its design.

For this case, the only solution I can imagine is a hack: first write the accented char in red, then backtrace and draw in black the same char but without accent:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{xcolor}
\def\trick#1#2{\textcolor{red}{#1}\llap{#2}}

\begin{document}
a \trick{â}{a} â
\end{document}


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I tried this with latex on Ubuntu and just got two regular a's with no accent or color. –  Joseph Garvin Jan 12 at 4:58
@JosephGarvin Sounds like a encoding issue. Instead of â, try writing \^a. Also, it could be a font problem; you can try using \usepackage{lmodern} instead of \usepackage[T1]{fontenc} –  JLDiaz Jan 12 at 8:50

Perhaps the following:

\documentclass{article}
\usepackage{color}

\newbox\accentboxa
\newbox\accentboxb

\newcommand{\redhat}[1]{\setbox\accentboxa=\hbox{\^#1}%
\setbox\accentboxb=\hbox{\^{}}\leavevmode
\kern\dimexpr(\wd\accentboxa-\wd\accentboxb)/2\relax
{\color{red}%
\raise\dimexpr\ht\accentboxa-\ht\accentboxb\relax\copy\accentboxb}%
\kern-\dimexpr(\wd\accentboxa+\wd\accentboxb)/2\relax #1}

\begin{document}

\^a\redhat{a}\^a

\^A\redhat{A}\^A

\end{document}


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