\documentclass[a4paper,12pt]{article}
\usepackage[usenames]{color}

\begin{document}
\pagecolor{black} % Background color

\color{white}     % Text color
\definecolor{Cq}{rgb}{1,.2,.2}
\definecolor{CE}{rgb}{.8,.1,.1}
\definecolor{Cv}{rgb}{.1,.7,.7}
\definecolor{CR}{rgb}{.7,.1,.7}
\definecolor{CF}{rgb}{.7,.0,.0}


\center

$ {\color{CE}\vec E} ={{\color{white}\vec F}\over {\color{Cq}q}  } $
 
$ $





\end{document}