The hyperref package allows you add internal and external hyperlinks to your TeX files. It’s very useful for making navigable documents but I find it benefits from some tweaking.

You can easily fix this by adding hidelinks to the document class declaration at the top of the page:

\documentclass[11pt,hidelinks]{article}


This removes all colours and coloured borders from links. The downside is your links are now invisible, meaning people might not know they’re there.

If you want links to be clearly identifiable then you can use the hypersetup command to style links. There is a small number of pre-defined colours you can choose from or you can \usepackage{xcolor} to get access to many more.

\documentclass{article}

\usepackage{hyperref}

\hypersetup{
urlcolor   = blue,
citecolor  = blue,
}

\begin{document}
Now my hyperlinks and citations and \href{http://example.com}{blue}.
\end{document}


Result of compiling the snippet above

\documentclass{article}

\usepackage{xcolor}
\definecolor{custom-blue}{RGB}{6,69,173} % Gives your custom colour a name

\usepackage{hyperref}
\hypersetup{
}

\begin{document}
I got the RGB colour values from this \href{https://en.wikipedia.org/wiki/Help:Link_color}{Wikipedia} page.
\end{document}


Result of compiling the snippet above

### Going Further

As with many packages hyperref is well documented and packed with useful snippets, making the manual worth a read.