One option using the tikzmark
library:
\documentclass[11pt,a4paper,sans]{moderncv}
\moderncvstyle{classic}
\moderncvcolor{blue}
\usepackage[scale=0.75]{geometry}
\usepackage{tikz}
\usetikzlibrary{tikzmark}
\name{John}{Doe}
\title{Title}
\address{\tikzmark{start}street and number}{postcode city}{country}
\phone[mobile]{+1~(234)~567~890}
\phone[fixed]{+2~(345)~678~901}
\phone[fax]{+3~(456)~789~012}
\email{[email protected]}
\homepage{www.johndoe.com}
\social[linkedin]{john.doe}
\social[twitter]{jdoe}
\social[github]{jdoe}
\extrainfo{additional information\tikzmark{end}}
\photo[64pt][0.4pt]{picture}
\quote{Some quote}
\begin{document}
\begin{tikzpicture}[remember picture,overlay]
\fill[color1!30]
(current page.north west) rectangle ([yshift=-1cm]current page.east|-{pic cs:end});
\end{tikzpicture}
\makecvtitle
\section{Education}
\cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description} \cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description}
\section{Master thesis}
\cvitem{title}{\emph{Title}}
\cvitem{supervisors}{Supervisors}
\cvitem{description}{Short thesis abstract}
\section{Experience}
\subsection{Vocational}
\cventry{year--year}{Job title}{Employer}{City}{}{General description no longer than 1--2 lines.\newline{}%
Detailed achievements:%
\begin{itemize}%
\item Achievement 1;
\item Achievement 2, with sub-achievements:
\begin{itemize}%
\item Sub-achievement (a);
\item Sub-achievement (b), with sub-sub-achievements (don't do this!);
\begin{itemize}
\item Sub-sub-achievement i;
\item Sub-sub-achievement ii;
\item Sub-sub-achievement iii;
\end{itemize}
\item Sub-achievement (c);
\end{itemize}
\item Achievement 3.
\end{itemize}}
\end{document}
You place some mark(s) using \tikzmark
and then use those marks to draw a rectangle filled with the desired color. In my example code I used
\begin{tikzpicture}[remember picture,overlay]
\fill[color1!30]
(current page.north west) rectangle ([yshift=-1cm]current page.east|-{pic cs:end});
\end{tikzpicture}
which draws a rectangle having opposite vertices in (current page.north west)
(i.e., the upper left corner of the page) and in the point with coordinates ([yshift=-1cm]current page.east|-{pic cs:end})
(this means 1cm below the point that has the same x-coordinate as the leftmost end of the page and the y-coordinate of the point marked end
); the end
mark was placed inside \extrainfo
which was the lowest element used in the personal information. I also placed a start
mark in the upper field of the personal information, but I never used this mark.
Feel free to change the colors, and position of the colored background, according to your needs.