\renewcommand{\bibname}{\color{red}Bibliography}
\bibliography{Reference}
I use the codes above but the color of "Bibliography" is not changed into red after compiling.
XeTeX ⇒ how to colorize the symbol "Bibliography"
how to colorize the symbol "Bibliography"
The best would be if you can offer us a
minimal working example.
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It is advisable to separate format and content if possible. For this purpose there would be different ways, depending on what you use.

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babel
in the preamble may prevent this change of the \bibname
command.It is advisable to separate format and content if possible. For this purpose there would be different ways, depending on what you use.