例如在使用tikz的node时设定颜色:color=FireBrick2,报错

Package xcolor Error: Undefined color `tikz@color'.

See the xcolor package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.56     \end{axis}

在tex文件开头添加

\usepackage[x11names]{xcolor}

无效。根据Package xcolor Error: Undefined colors “Maroon”/“Royal Blue” when master has PDF included classicthesis 3.1将x11names添加到documentsclass的选项中即可解决该问题:

\documentclass[a4paper,x11names]{article}
\usepackage{xcolor}

 

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