The code that generates the previous PDF diagram:
\documentclass{standalone}
% Imported packages:
\usepackage{venndiagram} % Needed for drawing Venn diagrams
% ---------------------------------
% New Colors:
\colorlet{first}{brown}
\colorlet{second}{pink}
\colorlet{rest}{cyan!40} % 40% cyan and 60% white
\begin{document}
\begin{venndiagram2sets}[showframe=false, hgap=0.2cm, vgap=0.2cm, labelA={}, labelB={}, overlap=1cm]
\setkeys{venn}{shade=rest}
\fillAll
\setkeys{venn}{shade=first}
\fillA
\setkeys{venn}{shade=second}
\fillB
\setkeys{venn}{shade=first!50!second}
\fillACapB
% The code below sets the locations of the labels $A$, $B$, and $U$ in the diagram:
% [You don't need to change the code below:]
\setpostvennhook{%
\draw (labelA) node[below=0.8cm] {$A\qquad$};
\draw (labelB) node[below=0.8cm] {$\qquad B$};
\draw (labelNotAB) node[above right=-4pt] {$U$};
}
\end{venndiagram2sets}%
\end{document}