Wireframe mode makes mesh grey?

Hi I am a complete noob, when wireframe is turned on the mesh turns grey instead of transparent. Was fine a while ago but don’t know what I did to have made this happen. Pelase help thanks.

Activate X-Ray with the next button on the left. Next time you switch to Wireframe mode, Blender will remember that state and your mesh should be transparent.

Capture d’écran 2023-12-11 à 10.26.42

thanks!!!