Sstrhsrtj

I found this on the Internet:

renewcommand{footrule}{hbox to headwidth{color{red}leadershrule height footrulewidthhfill}}

So I was wondering if there are any other solutions, that are more simple or just more understandable.

MWE:

documentclass[11pt]{article}

usepackage{color}

usepackage{fancyhdr}

pagestyle{fancy}

renewcommand{footrulewidth}{1pt}

renewcommand{footrule}{hbox to headwidth{color{red}leadershrule height footrulewidthhfill}}

Not sure if this is really easier than to just add the colour to the definition of the footline, but another method could be patch the command by adding the red colour before and switching back to black afterwards:

documentclass[11pt]{article}

usepackage{color}

usepackage{fancyhdr}

pagestyle{fancy}

renewcommand{footrulewidth}{1pt}



usepackage{xpatch}

xapptocmd{footrule}{color{black}}{}{}

xpretocmd{footrule}{color{red}}{}{}





begin{document}



x



newpage



x



end{document}

The definition you are using for the footrule is actually a little different to the default one contained in fancyhdr.sty, which is:

deffootrule{{if@fancyplainletfootrulewidthplainfootrulewidthfi

    vskip-footruleskipvskip-footrulewidth

    hrule@widthheadwidth@heightfootrulewidthvskipfootruleskip}}

It's not really necessary to understand this to use it. That's half the point of a package.

To make it coloured, you want to put color{red} at the start of the command, but after the brace that is immediately before if@fancyplain. Puting it within the group will ensure that the colour does not continue beyond the rule.

I would do this by patching footnoterule using the etoolbox package. Something like this (I also prefer xcolor to color—nicer features):

documentclass[11pt]{article}

usepackage{xcolor}

usepackage{fancyhdr}

pagestyle{fancy}

renewcommand{footrulewidth}{1pt}

usepackage{etoolbox}

makeatletter

patchcmd{footrule}

  {if@fancyplain}

  {color{red}if@fancyplain}

  {}

  {}

makeatother

begin{document}

null

end{document}