@Qrrbrbirlbel, thank you very much for the response to this link:How do I enclose and color vertices?, how do I make the yellow circle see its label?
I send you my latex code :
%https://q.uiver.app/#q=WzAsNixbNCwxXSxbMywxLCJ2XzQiXSxbMywzLCJ2XzUiXSxbMCw0LCJ2XzMiXSxbMCwyLCJ2XzIiXSxbMCwwLCJ2XzEiXSxbNSwxLCIiLDAseyJjb2xvdXIiOlswLDYwLDYwXSwic3R5bGUiOnsiaGVhZCI6eyJuYW1lIjoibm9uZSJ9fX1dLFszLDEsIiIsMix7ImNvbG91ciI6WzAsNjAsNjBdLCJzdHlsZSI6eyJoZWFkIjp7Im5hbWUiOiJub25lIn19fV0sWzQsMiwiIiwwLHsiY29sb3VyIjpbMCw2MCw2MF0sInN0eWxlIjp7ImhlYWQiOnsibmFtZSI6Im5vbmUifX19XSxbNSwyLCIiLDIseyJjb2xvdXIiOlswLDYwLDYwXSwic3R5bGUiOnsiaGVhZCI6eyJuYW1lIjoibm9uZSJ9fX1dXQ==
\[\begin{tikzcd}[cramped]
|[blue] [draw=blue, circle]| {v_1} \\
&&& {v_4} & {} \\
|[blue] [draw=blue, circle]| {v_2} \\
&&& {v_5} \\
|[red] [fill, yellow] [draw=blue, circle]| {v_3}
\arrow[draw={rgb,255:red,214;green,92;blue,92}, no head, from=1-1, to=2-4]
\arrow[draw={rgb,255:red,214;green,92;blue,92}, no head, from=5-1, to=2-4]
\arrow[draw={rgb,255:red,214;green,92;blue,92}, no head, from=3-1, to=4-4]
\arrow[draw={rgb,255:red,214;green,92;blue,92}, no head, from=1-1, to=4-4]
\end{tikzcd}\]

\documentclassend ending with\end{document}that shows the packages you use. – Jasper Habicht Dec 10 '23 at 06:21