在 bclogo 中为标题添加下划线并更改颜色

Question

\documentclass[xcolor=dvipsnames]{beamer}
\usecolortheme[named=blue]{structure}
\usepackage[tikz]{bclogo}

%------------------------\AtBeginSubsection[]----------------------
\AtBeginSubsection[]{%
  \begin{frame}<beamer>[noframenumbering,plain]{Outline}
  \transsplitverticalout
  \tableofcontents[currentsection,currentsubsection]
  \end{frame}
}

\usetheme{Madrid}

\begin{document}

\begin{frame}{}
  \begin{bclogo}[arrondi=0.1, logo=\bcquestion, couleurBarre=Maroon] 
        {Question}
    Why
    $$r_e(\mathbf{T})\geq r(\mathbf{T}) \;?$$
  \end{bclogo}
\end{frame}

\end{document}

编译后我得到

但是我想改变问题字的颜色，并给它加下划线，如下图所示

Answer 1

正如 JPi 的答案一样，使用soul包来强调标题，但使用bclogo机制来全局自定义标题

\documentclass[xcolor=dvipsnames]{beamer}

\usepackage{soul}
\setul{}{1.5pt}

\usepackage[tikz]{bclogo}
\renewcommand\bcStyleTitre[1]{\vskip-0.5em\bfseries\color{Maroon}\ul{#1}\vskip0em}

\begin{document}

\begin{frame}
  \begin{bclogo}[arrondi=0.1, logo=\bcquestion, couleurBarre=Maroon] 
        {Question}
    Why
    \[
        r_e(\mathbf{T})\geq r(\mathbf{T}) \;?
    \]
  \end{bclogo}
\end{frame}

\end{document}

Answer 2

\documentclass[xcolor=dvipsnames]{beamer}
      \usecolortheme[named=blue]{structure}
         \usepackage[tikz]{bclogo}
      %------------------------\AtBeginSubsection[]----------------------
     \AtBeginSubsection[]{
       \begin{frame}<beamer>[noframenumbering,plain]{Outline}
     \transsplitverticalout
    \tableofcontents[currentsection,currentsubsection]
       \end{frame}
      }

   \usetheme{Madrid}
\usepackage{soul}

     \begin{document}
\setul{}{1.5pt}

       \begin{frame}{}
        \begin{bclogo}[arrondi=0.1, logo=\bcquestion, couleurBarre=Maroon] 
              {\textcolor{red}{\ul{Question}}}
          Why
         \[r_e(\mathbf{T})\geq r(\mathbf{T}) \;?\]
          \end{bclogo}
        \end{frame}

     \end{document}