The LaTeX class ModernCV does not provide a black color theme option – and printouts can therefore contain rastered colors if printed on black and white printers.
I am using the classic layout and made the following changes in …/tex/latex/modercv/moderncvthemeclassic.sty to get a black color theme.
First of all I copied the style file and edited it as normal user, then copied the file to its original location as root.
In the code section Package options -> color options I added the lines
% black
\newif\if@colorblack\@colorblackfalse
\DeclareOption{black}{\@colorblacktrue}
immediately after the line
\DeclareOption{grey}{\@colorgreytrue}
Under Style definition -> color I added
\if@colorblack
\definecolor{addresscolor}{rgb}{0,0,0}
\definecolor{sectionrectanglecolor}{rgb}{0,0,0}
\definecolor{sectiontitlecolor}{rgb}{0,0,0}
\definecolor{subsectioncolor}{rgb}{0,0,0}
\definecolor{titlecolor}{rgb}{0,0,0}
\definecolor{quotecolor}{rgb}{0,0,0}
\fi
immediately after the lines
\if@colorgrey
\definecolor{addresscolor}{rgb}{0.35,0.35,0.35}
\definecolor{sectionrectanglecolor}{rgb}{0.75,0.75,0.75}
\definecolor{sectiontitlecolor}{rgb}{0.35,0.35,0.35}
\definecolor{subsectioncolor}{rgb}{0.35,0.35,0.35}
\definecolor{titlecolor}{rgb}{0,0,0}
\definecolor{quotecolor}{rgb}{0,0,0}\fi