How does one create a coloured footnote environment?

Question

Is there any way to create coloured footnote environments? Or to edit the footnote environment so it creates coloured footnotes?

Answer 1

Here I give \Cfootnote and \CBfootnote for colored footnote text and color-highlighted footnote text, respectively. I also change the footnote number to color, but that can easily be removed, if not needed.

\documentclass{article}
\usepackage{xcolor}
\usepackage{soul}
\let\svthefootnote\thefootnote
\newcommand\Cfootnote[2][black]{\def\thefootnote{\color{#1}\svthefootnote}%
  \footnote{\color{#1}#2}}
\newcommand\CBfootnote[2][black]{\def\thefootnote{\color{#1}\svthefootnote}%
  \footnote{\sethlcolor{#1}\hl{#2}}}
\textheight 1.5in
\begin{document}
This is  a test\Cfootnote[red]{Is this in red?} of Cfootnote.

And now we test\CBfootnote[cyan]{Is this in a cyan highlight?
We will make the footnote long enough so that it wraps, to verify that
wrapping works.} of CBfootnote.
\end{document}