如何在具有计数器的 tcolorbox 中自定义颜色

Question

我是 LaTeX 新手。我想自定义 tcolorbox 以自定义标题，并根据我的选择将背景颜色设为浅红色。我还想更改标题的字体颜色以及内部文本内容，根据我的选择将其设为深红色/蓝色。我该怎么做？请帮忙。

基本 MWE 由 feculededentier 在以下链接页面中提供

我找到了这个页面tcolorbox 标题中与章节相关的示例数字

Answer 1

最开始的近似值我只会取回答你提到的，去除chapter东西并添加颜色。

\documentclass{article}
\usepackage{etoolbox}
\usepackage{tcolorbox}
\tcbuselibrary{skins,breakable}
\usepackage{lipsum}

\tcbset{mytitle/.style={title={Example~\thetcbcounter\ifstrempty{#1}{}{: #1}}}}
\newtcolorbox[auto counter, number within=chapter, 
number freestyle={\noexpand\arabic{\tcbcounter}}]{myexample}[1][]{%
    enhanced,
    breakable,
    fonttitle=\bfseries,
    mytitle={},
    #1
}

\begin{document}


\begin{myexample}[colback=red!5!white,colframe=red!75!black,mytitle={First example}, label=exfirst]
  \lipsum[4]
\end{myexample}

\begin{myexample}[colback=red!5!white,colframe=blue!75!black]
  \lipsum[4]
\end{myexample}

\begin{myexample}[colback=red!5!white,colframe=red!75!black,mytitle={Third example}, label=exthird]
  \lipsum[4]
\end{myexample}

I can now refer to example~\ref{exfirst} and example~\ref{exthird}.
\end{document}

编辑：解决颜色问题的一种方法是引入新的宏。

\documentclass{article}
\usepackage{etoolbox}
\usepackage{tcolorbox}
\tcbuselibrary{skins,breakable}
\usepackage{lipsum}

\tcbset{mytitle/.style={title={Example~\thetcbcounter\ifstrempty{#1}{}{: #1}}}}
\newtcolorbox[auto counter, number within=chapter, 
number freestyle={\noexpand\arabic{\tcbcounter}}]{myexample}[1][]{%
    enhanced,
    breakable,
    fonttitle=\bfseries,
    mytitle={},
    #1
}

\newcommand{\BlueBox}[3][]{
\begin{myexample}[colback=blue!5!white,colframe=blue!75!black,mytitle={#2},#1]
 #3
\end{myexample}
}

\newcommand{\RedBox}[3][]{
\begin{myexample}[colback=blue!5!white,colframe=red!75!black,mytitle={#2},#1]
 #3
\end{myexample}
}


\begin{document}


\RedBox[label=exfirst]{First Example}{\lipsum[1]}

\BlueBox[label=exsecond]{}{\lipsum[2]}

\RedBox[label=exthird]{Third Example}{\lipsum[3]}


I can now refer to example~\ref{exfirst} and example~\ref{exthird}.
\end{document}

Answer 2

欢迎：）

\documentclass{book}
\usepackage{tcolorbox}
    \tcbuselibrary{skins,breakable}
\usepackage{lipsum}

\newtcolorbox[auto counter, number within=chapter, number freestyle={\noexpand\thechapter.\noexpand\arabic{\tcbcounter}}]{myexample}[2][]{%
    enhanced,
    breakable,
    fonttitle=\bfseries,
    title=\textcolor{red}{Example}~\textcolor{red}{\thetcbcounter:} \textcolor{red}{#2},
    #1
}

\newtcolorbox[auto counter, number within=chapter, number freestyle={\noexpand\thechapter.\noexpand\arabic{\tcbcounter}}]{myexampleblue}[2][]{%
    enhanced,
    breakable,
    fonttitle=\bfseries,
    title=\textcolor{blue}{Example}~\textcolor{blue}{\thetcbcounter:} \textcolor{blue}{#2},
    #1
}

\begin{document}

\chapter{First chapter}

\begin{myexample}[label=exfirst]{First example}
  \lipsum[4]
\end{myexample}

\begin{myexampleblue}{Second example}
  \lipsum[4]
\end{myexampleblue}


I can now refer to example~\ref{exfirst} and example~\ref{exthird}.
\end{document}