\documentclass[a4paper, 12pt]{article}

% basic text stuff
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{tikz} % main tikz package
\usetikzlibrary{intersections} % to name paths and compute intersections

\definecolor{nblue}{rgb}{0.38, 0.51, 0.71} %glaucous, 97,130,181, #6182B5
\definecolor{nred}{RGB}{175, 49, 39} % AF3127
\definecolor{norange}{RGB}{217, 156, 55} % D99C37
\definecolor{ncyan}{RGB}{120, 169, 170}

\begin{document}

\begin{tikzpicture}[thick]
    \draw [fill=nred!60, fill opacity=0.5, name path=c1] (0,0) circle (2cm);
    \draw [fill=nblue!60, fill opacity=0.5, name path=c2] (2cm,0) circle (2cm);
    \begin{scope}
        \clip (0,0) circle (2cm);
        \clip (0,0) rectangle (2,2);
        \fill[ncyan] (2,0) circle (2cm);
    \end{scope}
    \begin{scope}
        \clip (0,0) circle (2cm);
        \clip (0,0) rectangle (2,-2);
        \fill[norange] (2,0) circle (2cm);
    \end{scope}
    \node[label=left:u] (u) at (0,0) {\textbullet};
    \node[label=right:v] (v) at (2,0) {\textbullet};
    \node[label={[label distance=0.2]-45:m}] (m) at (1,0) {\textbullet};
    \node (A) at (1.3,0.7) {A};
    \node (B) at (0.7,-0.7) {B};

    \path [name intersections={of=c1 and c2,by=t}];
    \node[label=above:t] at (t) {\textbullet} ;
    \draw (u) -- (v) [dashed];
    \draw (m) -- (t) [->,>=latex];
\end{tikzpicture}

\end{document}