# Add big quotation marks inside my colorbox

I have this code (MWE):

\documentclass{article}
\usepackage{tikz,lmodern}
\usepackage[most]{tcolorbox}

\newtcbtheorem{theo}%
{Definition}{fonttitle=\bfseries\upshape,
arc=0mm, colback=blue!5!white,colframe=blue!75!black}{theorem}

\begin{document}

\begin{theo}{Translationally ordered structure}{transtructure}
A translationally ordered structure is a structure whose scattering amplitude [structure factor] is given by a discrete sum of Bragg peaks''
\end{theo}

\end{document}


that produces this:

I would like to add e.g. this vector graphics big quotation marks to make my box look like this:

How can I do it?

Like this?

\documentclass{article}
\usepackage{tikz,lmodern}
\usepackage[most]{tcolorbox}

\newtcbtheorem{theo}%
{Definition}{fonttitle=\bfseries\upshape,
arc=0mm,enhanced,
underlay={%
\begin{tcbclipinterior}
\fill [blue!5!white]
(interior.south west) rectangle (interior.north east);
\node[opacity=0.4,scale=4,anchor=north west,inner sep=0.2pt,
font=\bfseries] at
(interior.north west) {};
\node[opacity=0.4,scale=4,anchor=south east,inner sep=0.2pt,
font=\bfseries] at
([yshift=-3ex]interior.south east) {''};
\end{tcbclipinterior}},% colback=blue!5!white,
before upper=\hspace*{1em},after upper=\hspace*{1em},
colframe=blue!75!black}{theorem}

\begin{document}

\begin{theo}{Translationally ordered structure}{transtructure}
A translationally ordered structure is a structure whose scattering amplitude
[structure factor] is given by a discrete sum of Bragg peaks.
\end{theo}

\end{document}


You can modify it, of course. For example

\documentclass{article}
\usepackage{tikz,lmodern}
\usepackage[most]{tcolorbox}

\newtcbtheorem{theo}%
{Definition}{fonttitle=\bfseries\upshape,
arc=0mm,enhanced,
underlay={%
\begin{tcbclipinterior}
\fill [blue!5!white]
(interior.south west) rectangle (interior.north east);
\node[opacity=0.3,xscale=5,yscale=4,anchor=north west,inner sep=0.1pt,
font=\bfseries] at
(interior.north west) {\hspace*{-0.1em}};
\node[opacity=0.3,xscale=5,yscale=4,anchor=south east,inner sep=0.1pt,
font=\bfseries] at
([yshift=-3ex]interior.south east) {'\hspace*{-0.1em}'};
\end{tcbclipinterior}},% colback=blue!5!white,
before upper=\hspace*{1em},after upper=\hspace*{1em},
colframe=blue!75!black}{theorem}

\begin{document}

\begin{theo}{Translationally ordered structure}{transtructure}
A translationally ordered structure is a structure whose scattering amplitude
[structure factor] is given by a discrete sum of Bragg peaks.
\end{theo}

\end{document}


And you can include any graphics you want instead of the text nodes. My problem with the link you suggest is that I do not know if I am legally allowed to use the graphics from that link.

• Perfect, thanks very much. – SuperCiocia Mar 22 at 17:05