ckeditor5-image-upload-base64/packages/ckeditor5-basic-styles/theme/code.css

The development environment of CKEditor 5 – the best browser-based rich text editor.

/*
 * Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */

.ck-content code {
	background-color: hsla(0, 0%, 78%, 0.3);
	padding: .15em;
	border-radius: 2px;
}

.ck.ck-editor__editable .ck-code_selected  {
	background-color: hsla(0, 0%, 78%, 0.5);
}