列表背景颜色不完全相同

Question

该软件包xcolor有两种设置 RGB 颜色空间的变体，取决于是否使用大写字母（RGB与rgb）：

\definecolor{mygray}{RGB}{245,245,245}

这是众所周知的表示，其中 min 是0并且最大值是255，和

\definecolor{mygray}{rgb}{0.5,0.5,0.5}

其中有另一个尺度，最小值为0.0并且最大值是1.0。

在您的 MWE 中，您\definecolor实际上在第三处重新定义mygray为更暗的变体，因为以下几行是相等的：

\definecolor{mygray}{rgb}{0.5,0.5,0.5}
\definecolor{mygray}{RGB}{127,127,127}

如果你删除这一行，一切看起来都很好：

\documentclass[border=2pt]{standalone}
%\usepackage[a4paper,margin=1cm]{geometry}

\usepackage{listings}
\usepackage{xcolor}

\definecolor{mygray}{RGB}{245,245,245}
\definecolor{mygreen}{rgb}{0,0.6,0}
%\definecolor{mygray}{rgb}{0.5,0.5,0.5}
\definecolor{mymauve}{rgb}{0.58,0,0.82}

\lstset{ %
    backgroundcolor=\color{mygray},   % choose the background color; you must add \usepackage{color} or \usepackage{xcolor}
    basicstyle=\footnotesize,        % the size of the fonts that are used for the code
    breakatwhitespace=false,         % sets if automatic breaks should only happen at whitespace
    breaklines=true,                 % sets automatic line breaking
    captionpos=b,                    % sets the caption-position to bottom
    commentstyle=\color{mygreen},    % comment style
    deletekeywords={...},            % if you want to delete keywords from the given language
    escapeinside={\%*}{*)},          % if you want to add LaTeX within your code
    extendedchars=true,              % lets you use non-ASCII characters; for 8-bits encodings only, does not work with UTF-8
    frame=single,                    % adds a frame around the code
    keepspaces=true,                 % keeps spaces in text, useful for keeping indentation of code (possibly needs columns=flexible)
    keywordstyle=\color{blue},       % keyword style
    language=c,                 % the language of the code
    otherkeywords={*,...},           % if you want to add more keywords to the set
    numbers=left,                    % where to put the line-numbers; possible values are (none, left, right)
    numbersep=5pt,                   % how far the line-numbers are from the code
    numberstyle=\tiny\color{mygray}, % the style that is used for the line-numbers
    rulecolor=\color{black},         % if not set, the frame-color may be changed on line-breaks within not-black text (e.g. comments (green here))
    showspaces=false,                % show spaces everywhere adding particular underscores; it overrides 'showstringspaces'
    showstringspaces=false,          % underline spaces within strings only
    showtabs=false,                  % show tabs within strings adding particular underscores
    stepnumber=2,                    % the step between two line-numbers. If it's 1, each line will be numbered
    stringstyle=\color{mymauve},     % string literal style
    tabsize=2,                       % sets default tabsize to 2 spaces
    title=\lstname                   % show the filename of files included with \lstinputlisting; also try caption instead of title
}

\begin{document}
    \begin{lstlisting}
    #include <stdio.h>

    int main() {
    print "hello world\n";
    }
    \end{lstlisting}
\end{document}

还要注意的是mygreen和mymauve也很暗，因为它们也与

\definecolor{mygreen}{RGB}{0,153,0}
\definecolor{mymauve}{RGB}{148,0,209}

但规模不同。

Answer 1