Test dark slide background.

test_dark_bg.sh

#!/bin/bash -x

filename=sinx
epsfile=${filename}.eps
tex_master=main.tex
tex_cmd=pdflatex
color=white # color which you want to change to.

gnuplot <<EOF
set terminal postscript eps enhanced color 30
set output "${epsfile}"

# background
set object 1 rect from graph 0, 0, 0 to graph 1, 1, 0 \
   behind lw 1.0 fc rgb "#000000" fillstyle solid 1.00 border -1

# border
set border lw 3 lc rgb "${color}"

# grid
set grid lc rgb "${color}"

# tics
set xtics textcolor rgb "${color}"
set ytics textcolor rgb "${color}"

# labels
set xlabel "X" textcolor rgb "${color}"
set ylabel "Y" textcolor rgb "${color}"

# key
set key textcolor rgb "${color}"

plot sin(x) lw 2 lc rgb "green" # test sinx()
EOF

cat <<EOF > ${tex_master}
\documentclass[serif]{beamer}
\usepackage{tikz}
\usefonttheme{structurebold} % bolded fonts

\setbeamercolor{normal text}{bg=black,fg=white}
\setbeamercolor{frametitle}{fg=white}
\setbeamertemplate{navigation symbols}{} %no nav symbols

\title{}
\author{}
\date{}

\begin{document}
\begin{frame}
  \frametitle{test}
  \begin{center}
    \includegraphics[scale=0.8]{${epsfile}}
  \end{center}
\end{frame}
\end{document}
EOF

$tex_cmd $tex_master
rm -f *.toc *.snm *.out *.nav *.aux *.log