# How to change caption color for a color theme in beamerposter?

I am facing a problem. In my poster, I use a color theme, for that reason in figure caption comes with green color, that is quite invisible.

Is it possible to change the color?

\documentclass[final, 12pt]{beamer}
\usepackage[size=custom,width=120,height=120,scale=1.7,orientation=portrait]{beamerposter}
\usepackage[english]{babel}
\usepackage{graphicx}
\usepackage{wrapfig,xcolor,pgf}
\usepackage{array,booktabs,tabularx,amsthm,multirow,amsmath}
\usepackage[absolute,overlay]{textpos}% text under figure
\usepackage{pifont}
\usepackage{pslatex}
\usepackage{ragged2e} %for justify tex
\usepackage{lipsum}
\usepackage{etoolbox}
\apptocmd{\frame}{\justifying}{}{}

\setbeamertemplate{caption}[numbered]

\newenvironment<>{varblock}[2][\textwidth]{%
\setlength{\textwidth}{#1}
\begin{actionenv}#3%
\def\insertblocktitle{ \centering#2\par}%
\par%
\usebeamertemplate{block begin}}
{\par%
\usebeamertemplate{block end}%
\end{actionenv}}

\usecolortheme[RGB={180,250,80}]{structure}
\usetheme[height=0mm]{Rochester}

\begin{document}
\begin{frame}

\begin{textblock}{}(6,3.95)%
\begin{varblock}[42cm]{}
\begin{figure}
\includegraphics{1.jpg}
\caption{ Individual source location A ($\mathrm{L_{A}}$) .}
\label{1}
\end{figure}
\end{varblock}
\end{textblock}

\end{frame}
\end{document}

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## 1 Answer

You can set the caption name color:

\setbeamercolor{caption name}{<color>}


For example, you could use

\setbeamercolor{caption name}{fg=structure!70!black}


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The above answer didn't work for me, but rummaging through texdoc and online search this finally worked: \captionsetup{textfont=black,labelfont=black} (That's in the document's preamble) Hope it helps someone else. –  user18570 Sep 10 '12 at 15:51
\captionsetup requires additional packages, (caption, for example); using just black will produce errors, since just black is not a default valid option for textfont or labelfont`. –  Gonzalo Medina Sep 10 '12 at 17:55
@JunCTionS For me, Gonzalo's method does work perfectly well –  Joseph Wright Sep 10 '12 at 19:39
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