How to use a custom font from LuaLaTeX with coloredlettrine?

Question

I have installed a new custom font (OTF & TTF); and I would like to use it with the package coloredlettrine.

Which steps would I need to follow to be able to use it?

MWE:

\documentclass{memoir}

\usepackage{coloredlettrine}
\renewcommand{\EBLettrineBackColor}{blue}

\begin{document}
    \coloredlettrine{P}{ray}:
\end{document}