我有一个用环境构建的表格tabu，它不能显示其包含的 URL 的正确颜色，即使链接本身有效（即它在浏览器中打开网页）。
但是，从下面的示例中可以看出，链接在tabular和longtable环境中显示正确。
\documentclass{article}
\usepackage{longtable,tabu,tabularx}
\usepackage[colorlinks=true,urlcolor={[rgb]{.5,.5,.5}}]{hyperref}
\begin{document}
This link has the correct color: \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}.
\begin{tabular}{|r|l|}
an url in tabular & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{tabular}
\begin{tabu} spread 0pt {|r|l|}
an url in tabu & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{tabu}
\begin{longtable}{|r|l|}
an url in longtable & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{longtable}
\begin{longtabu} spread 0pt {|r|l|}
an url in longtabu & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{longtabu}
\end{document}
那么，有没有办法让颜色在里面起作用tabu，还是我必须切换到其他环境？
答案1
我并不建议使用tabu。不过，解决方案很简单：通过名称定义颜色。
\documentclass{article}
\usepackage{longtable,tabu,tabularx}
\usepackage{xcolor}
\usepackage[colorlinks=true,urlcolor=myurlcolor]{hyperref}
\definecolor{myurlcolor}{rgb}{.8,.1,.1}
\begin{document}
This link has the correct color: \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}.
\begin{tabular}{|r|l|}
an url in tabular & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{tabular}
\begin{tabu} spread 0pt {|r|l|}
an url in tabu & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{tabu}
\begin{longtable}{|r|l|}
an url in longtable & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{longtable}
\begin{longtabu} spread 0pt {|r|l|}
an url in longtabu & \href{http://tex.stackexchange.com}{http://tex.stackexchange.com}
\end{longtabu}
\end{document}
