洋红色也是如此 - 我尝试以明显的方式 \definecolor 我自己纯青色和洋红色，但两者都明显偏离（如果仔细观察，黄色也是如此）。这个功能是否意味着这样在彩色打印机上看起来更正确（我还没有尝试过，我没有……）我应该不是覆盖 xcolor 的默认值？更奇怪的是，我看不出红色、绿色和蓝色有什么区别。（请注意，其他“特殊”颜色也不一定符合您的预期。）
MWE（最低工作不美观，不含包装）
\begin{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\definecolor{test1}{rgb}{0,0,0}
\definecolor{test2}{rgb}{0,0,255}
\definecolor{test3}{rgb}{0,255,0}
\definecolor{test4}{rgb}{0,255,255}
\definecolor{test5}{rgb}{255,0,0}
\definecolor{test6}{rgb}{255,0,255}
\definecolor{test7}{rgb}{255,255,0}
\definecolor{test8}{rgb}{255,255,255}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\noindent
\textcolor{test2}{$\bullet$} \textcolor{blue}{$\bullet$}\\
\textcolor{test3}{$\bullet$} \textcolor{green}{$\bullet$}\\
\textcolor{test5}{$\bullet$} \textcolor{red}{$\bullet$}\\
\textcolor{test4}{$\bullet$} \textcolor{cyan}{$\bullet$}\\
\textcolor{test6}{$\bullet$} \textcolor{magenta}{$\bullet$}\\
\textcolor{test7}{$\bullet$} \textcolor{yellow}{$\bullet$}\\
\end{document}