如何在背景中添加颜色渐变

Question

我想在整个页面中添加颜色渐变，因为在 xelatex 中的一篇文章中，从上到下红色慢慢变成蓝色。我尝试过

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{background}
\usepackage{blindtext}
\backgroundsetup{
scale=1,
angle=0,
opacity=1,
contents={\begin{tikzpicture}[remember picture,overlay]
    \path [left color =red,middle color = blue, right color = Blue] (current page.south west)rectangle (current page.north east);
    \end{tikzpicture}}}
\begin{document}
 ABC

\end{document}

但编译结果如下

我想在整个页面中创建这个渐变

Answer 1

删除方括号及其内容\begin{tikzpicture} ... \end{tikzpicture}。问题是由环境引起的overlay，但您不需要remember picture，因此您可以将两者全部删除。

基于您的代码的 MWE：

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{background}
\usepackage{blindtext}
\backgroundsetup{
scale=1,
angle=0,
opacity=1,
contents={\begin{tikzpicture}
    \path [left color =red,middle color = blue, right color = Blue] (current page.south west)rectangle (current page.north east);
    \end{tikzpicture}}}
\begin{document}
 ABC
\end{document}

Answer 2

您可以使用每个页面来代替背景。别忘了运行两次。

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usepackage{everypage}
\usepackage{blindtext}
\AddEverypageHook{\begin{tikzpicture}[remember picture,overlay]
    \path [left color =red,middle color = blue, right color = Blue] (current page.south west)rectangle (current page.north east);
    \end{tikzpicture}}
\begin{document}
 ABC

\end{document}