Me gustan los colores de la sección del código SO. así que deseo usarlo como color de fondo del cuadro de listados de códigos.
Utilizo una herramienta de captura de pantalla para capturar el color de fondo del código en png, luego uso la herramienta GIMP para verificar que el valor RGB sea (245,245,245). pero cuando uso el siguiente código para definir dicho color y lo uso como color de fondo, parece que el color es demasiado oscuro que los colores del código SO.
\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}
Producción
¿Qué pasa con mi código de color de fondo?
Respuesta1
El paquete xcolortiene dos variantes para configurar el espacio de color RGB, dependiendo de si se utilizan letras mayúsculas o no ( RGBvs. rgb):
\definecolor{mygray}{RGB}{245,245,245}
que es una representación bien conocida donde min es0y máximo es255, y
\definecolor{mygray}{rgb}{0.5,0.5,0.5}
que tiene otra escala donde min es0.0y máximo es1.0.
En su MWE, en tercer lugar, \definecolorde hecho, redefinió mygrayla variante más oscura, ya que las siguientes líneas son iguales:
\definecolor{mygray}{rgb}{0.5,0.5,0.5}
\definecolor{mygray}{RGB}{127,127,127}
Si eliminas esta línea, todo se ve bien:
\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}
Fíjate también que mygreeny mymauvetambién son muy oscuros, ya que también son idénticos a
\definecolor{mygreen}{RGB}{0,153,0}
\definecolor{mymauve}{RGB}{148,0,209}
pero en otra escala.