Is it possible to add double frame in a tcolorbox? Actually I am trying to design a chapter using titlesec and tcolorbox which has two borders. Inner border colour will be white ( same as the page colour ) and the outer border colour will be cyan ( same as the box background colour) something like this.

[![enter image description here](https://i.stack.imgur.com/OpVhR.png)](https://i.stack.imgur.com/OpVhR.png) 

This is the code which I was trying :

```
\usepackage[explicit]{titlesec}
\usepackage[many]{tcolorbox}
\definecolor{myCyan}{HTML}{13C39D}
\titleformat{\chapter}[display]
{\sffamily\bfseries\Huge\filcenter}
{}
{0pt}
{%
    \begin{tcolorbox}[
        enhanced,
        colback = myCyan,
        fontupper=\color{white},
        boxrule=0pt,
        colframe=black!70!white,
        arc=0pt,
        outer arc=0pt,
        top=20pt,
        bottom=20pt,
        left=20pt,
        right=20pt,
        ]
        \begin{center}
            #1
        \end{center}
    \end{tcolorbox}%
}

\titlespacing*{\chapter}{0pt}{0cm}{0cm}

```