All designs / Backgrounds / Seasonal and holidays
Blurred Christmas tree lights
Seasonal and holidays The photo fills the whole card. Your callsign and contact details go on a light or dark panel over it, and you can choose which at the design step.

A sample station on the dark panel, with the photo darkened 5 percent so the writing stays clear. The design step lets you choose the other panel or change the dimming. The bare photo is below.

Photo: "Festive Christmas lights create bokeh (Unsplash)" by Charlotte Coneybeer she_sees, CC0 1.0, via Wikimedia (https://commons.wikimedia.org/wiki/File:Festive_Christmas_lights_create_bokeh_(Unsplash).jpg). Free to use on your cards.