上述代码中未定义控制序列 \href

Question

通过以下代码示例，我收到错误“未定义控制序列 \href”。为什么？

\documentclass[dvips,12pt]{article}
\usepackage[pdftex]{graphicx}
\usepackage{url}
\setlength{\oddsidemargin}{0.25in}
\setlength{\textwidth}{6.5in}
\setlength{\topmargin}{0in}
\setlength{\textheight}{8.5in}

\usepackage{hyperref}

\begin{document}

\title{\textbf {Demography}}
\author{Jack Dov}
\date{\today}

\maketitle

\section{}

  \href{https://www.prospectmagazine.co.uk/magazine/theres-nothing-new-about-post-truth-politics}{\color{blue}recent}

  \end{document}

Answer 1

错误信息是

! Undefined control sequence.
<argument> ...toreSpaceFactor \Hy@LinkMath \color 
                                                  {blue}recent\Hy@xspace@end...
l.21 ...t-post-truth-politics}{\color{blue}recent}

? 

这表明未定义的命令是\color因为您尚未加载color或xcolor包。