MediaWiki:Gadget-Wikitext-Extension.css

.skin-citizen #wikitext-extension-gadget-vscode,
.skin-citizen #wikitext-extension-gadget-vscode-insiders,
.skin-citizen #wikitext-extension-gadget-vscodium {
	order: 97; /* Before Edit/VisualEditor buttons */
}

.skin-citizen #wikitext-extension-gadget-vscode a:before,
.skin-citizen #wikitext-extension-gadget-vscode-insiders a:before,
.skin-citizen #wikitext-extension-gadget-vscodium a:before {
	display: block;
	content: "";
	width: var( --size-icon );
	height: var( --size-icon );
	background: transparent center/contain no-repeat;
	opacity: var( --opacity-icon-base );
	filter: var( --filter-invert );
}

.skin-citizen #wikitext-extension-gadget-vscode a:before,
.skin-citizen #wikitext-extension-gadget-vscode-insiders a:before {
	background-image: url( https://dev-media.dsp-wiki.com/e/eb/Visual_Studio_Code_-_Simple_Icons.svg );
}

.skin-citizen #wikitext-extension-gadget-vscodium a:before {
	background-image: url( https://dev-media.dsp-wiki.com/e/eb/VS_Codium_-_Simple_Icons.svg );
}