Specific colour in equation links

Question

In hyperref package, is it possible to specify a specific color for equation links different than other link colors ?

Following are present color specifications that I am using for hyperref package

colorlinks=true,       % false: boxed links; true: colored links
linkcolor=red,          % color of internal links
citecolor=blue,        % color of links to bibliography
filecolor=magenta,      % color of file links
urlcolor=cyan

(Is it possible to do it with \cref ?)

Thanks.

Are you using amsmath or any other cross-referencing package? — Werner, Sep 13 '13 at 06:22

Heiko Oberdiek · Answer 1 · 2013-09-13T20:01:16.583

19

You can define your own link command for equations and change the (border) color for links locally.

LaTeX with `\ref`

\documentclass[a5paper]{article}

\usepackage{xcolor}
\colorlet{linkequation}{blue}
\usepackage[colorlinks]{hyperref}

\newcommand*{\refeq}[1]{%
  \begingroup
    \hypersetup{
      linkcolor=linkequation,
      linkbordercolor=linkequation,
    }%
    \ref{#1}%
  \endgroup
}

\begin{document}
\tableofcontents
\section{Example}\label{sec:example}
\begin{equation}
\label{eq:einstein}
E=mc^2
\end{equation}
See section \ref{sec:example} and equation \refeq{eq:einstein}.
\end{document}

$Result \refeq$

Package `amsmath` and `\eqref`

And an example for the redefinition of \eqref from package amsmath:

\documentclass[a5paper]{article}

\usepackage{amsmath}

\usepackage{xcolor}
\colorlet{linkequation}{blue}
\usepackage[colorlinks]{hyperref}

\newcommand*{\SavedEqref}{}
\let\SavedEqref\eqref
\renewcommand*{\eqref}[1]{%
  \begingroup
    \hypersetup{
      linkcolor=linkequation,
      linkbordercolor=linkequation,
    }%
    \SavedEqref{#1}%
  \endgroup
}

\begin{document}
\tableofcontents
\section{Example}\label{sec:example}
\begin{equation}
\label{eq:einstein}
E=mc^2
\end{equation}
See section \ref{sec:example} and equation \eqref{eq:einstein}.
\end{document}

$Result \eqref$

Package `cleveref` and `\cref`

\documentclass[a5paper]{article}

\usepackage{xcolor}
\colorlet{linkequation}{blue}
\usepackage[colorlinks]{hyperref}
\usepackage{cleveref}

\makeatletter
\creflabelformat{equation}{%
  \textup{%
    \hypersetup{
      linkcolor=linkequation,
      linkbordercolor=linkequation,
    }%
    (#2#1#3)%
  }%
}
\makeatother

\begin{document}
\tableofcontents
\section{Example}\label{sec:example}
\begin{equation}
\label{eq:einstein}
E=mc^2
\end{equation}
See section \ref{sec:example} and \cref{eq:einstein}.
\end{document}

$Result \cref$

edited Sep 13 '13 at 20:01

answered Sep 13 '13 at 06:45

Heiko Oberdiek

271,626

Thanks a lot. At present I am using cleveref package to refer to equations and all others (for example, tables, figures, sections). Is it possible to do it with \cref ? – cosmicraga Sep 13 '13 at 06:58
please get rid of the redundant "eq." in the \cref example. in fact, with the parentheses, the "equation" isn't needed either, but isn't as annoying. – barbara beeton Sep 13 '13 at 16:53
@barbarabeeton: Thanks, redundant "equation" removed. – Heiko Oberdiek Sep 13 '13 at 20:02
This is very helpful. – user19832 Jul 15 '16 at 14:20
But how to redefine the color of \ref 's linkcolor? I try to use the same method of \eqref but it is not work. – user19832 Jul 15 '16 at 14:36
1

@user19832 See hyperref's option linkcolor. – Heiko Oberdiek Jul 15 '16 at 16:46
@HeikoOberdiek I mean change \ref 's linkcolor locally, not the all of the linkcolor. – user19832 Jul 16 '16 at 00:58
@user19832 \begingroup\hypersetup{linkcolor=<color>}\ref{<label>}\endgroup or option linkbordercolor for links with rectangles. – Heiko Oberdiek Jul 16 '16 at 09:40
I have noticed that these new defined references do not work well in a figure caption environment. I always get an error – Wallflower Apr 17 '23 at 11:41
1

@Wallflower The argument of macro \caption usually moves to the .aux and .lof file. Fragile stuff can break and need protection. E.g. \protect\hypersetup or define a protected macro using \DeclareRobustCommand. – Heiko Oberdiek May 25 '23 at 22:48

Specific colour in equation links

1 Answers1

LaTeX with `\ref`

Package `amsmath` and `\eqref`

Package `cleveref` and `\cref`

Linked

Specific colour in equation links

1 Answers1

LaTeX with \ref

Package amsmath and \eqref

Package cleveref and \cref

Linked

LaTeX with `\ref`

Package `amsmath` and `\eqref`

Package `cleveref` and `\cref`