Change horizontal line color on top of footer
This works....
\documentclass{article}
\usepackage{xcolor}
\usepackage{fancyhdr}
\renewcommand{\headrulewidth}{0.5pt}
\renewcommand{\headrule}{\hbox to\headwidth{\color{red}\leaders\hrule height \headrulewidth\hfill}}
\renewcommand{\footrulewidth}{0.5pt}
\renewcommand{\footrule}{\hbox to\headwidth{\color{red}\leaders\hrule height \footrulewidth\hfill}}
\pagestyle{fancy}
\begin{document}
hello
\end{document}