Пример использования пакета fancyvbr
\documentclass[a4paper,10pt]{scrartcl}
\usepackage{color}
\usepackage[utf8]{inputenc}
\usepackage{fancyvrb}
\usepackage[usenames,dvipsnames]{xcolor}
\fvset{frame=single,framesep=1mm,fontfamily=courier,fontsize=\scriptsize,numbers=left,framerule=.3mm,numbersep=1mm,commandchars=\\\{\}}
\begin{document}
\begin{Verbatim}[label={My orange command sample output}]
# \textcolor{Orange}{My orange command}
My black output
that it can be
many lines long
but this specific \textbf{\textcolor{OliveGreen}{word}}
and the following 2
\textbf{\textcolor{red}{lines are important so they}}
\textbf{\textcolor{red}{need to be highlighted and bold}}
\end{Verbatim}
\end{document}