\chapterimage{myimage.jpg} \chapter[Short title]{Long Chapter Title} \label{ch:raisingPets}
But for various reasons involving titles, the TOC, numbering, etc., that's not suitable for frontmatter or backmatter. For these, I've found a bunch of things floating around on forums, which include the following:
\chapterimage{myimage.jpg} \chapter*[Short title]{Long Chapter Title}
\label{ch:raisingPets}
\cleardoublepage
\phantomsection
\setlength{\columnsep}{0.75cm}
\addcontentsline{toc}{chapter}{\textcolor{ocre}{Short title}}
I imagine the answer is some combination of the above, but since I'm not very experienced with LaTeX, I simply can't figure this out.
In short: What code should be used to create a frontmatter or backmatter chapter with Legrand Orange?