It took me a while to figure out how to draw the following 2 sets Venn diagramm. So I am posting the code here in case it will make someone's hapiness.
\documentclass{article}
\usepackage{tikz}
\usepackage{caption}
\definecolor{airforceblue}{rgb}{0.36, 0.54, 0.66}
\definecolor{brightgreen}{rgb}{0.4, 1.0, 0.0}
\begin{document}
\begin{tikzpicture}
% Set J
\node [circle,
fill=airforceblue,
draw=orange,
line width=2mm,
minimum size =3cm,
label={[label distance=0.1cm,orange,font=\Large]225:$J$}] (J) at (0,0){};
% Set K
\node [circle,
fill=airforceblue,
draw=brightgreen,
line width=2mm,
minimum size =3cm,
label={[label distance=0.1cm,brightgreen,font=\Large]45:$K$}] (K) at (1.8,0){};
% Circles outline
\draw[orange,thick] (0,0) circle(1.5cm);
\draw[white,thick] (1.8,0) circle(1.5cm);
% Union text label
\node[airforceblue!90!black] at (0.9,1.8) {$J\cup K$};
% Intersection text label
\node at (0.9,0) {$J\cap K$};
% Complements text label
\node[left,white] at (J.center){$J \setminus K$};
\node[right,white] at (K.center){$K \setminus J$};
\end{tikzpicture}
%\captionof{figure}{Venn diagramms for union, intersection and complement}
\end{document}
I use inital code from here and personalised it.