View source for Module:Message box/imbox.css

/**
 * {{imbox}} (image message box) styles
 *
 * @source https://www.mediawiki.org/wiki/MediaWiki:Gadget-enwp-boxes.css
 * @revision 2021-07-15
 */
table.imbox {
	margin: 4px 10%;
	border-collapse: collapse;
	/* Default "notice" blue */
	border: 3px solid var(--border-color-progressive, #36c);
	background-color: var(--background-color-neutral-subtle, #f8f9fa);
	box-sizing: border-box;
}

/* For imboxes inside imbox-text cells. */
.imbox .mbox-text .imbox {
	/* 0.9 - 0.5 = 0.4em left/right.        */
	margin: 0 -0.5em;
	/* Fix for webkit to force 100% width.  */
	display: block;
}

/* For imboxes inside other templates.  */
.mbox-inside .imbox {
	margin: 4px;
}

/* An empty narrow cell */
.imbox td.mbox-empty-cell {
	border: none;
	padding: 0;
	width: 1px;
}

/* The message body cell(s) */
.imbox th.mbox-text,
.imbox td.mbox-text {
	border: none;
	/* 0.9em left/right */
	padding: 0.25em 0.9em;
	/* Make all mboxes the same width regardless of text length */
	width: 100%;
}

/* The left image cell */
.imbox td.mbox-image {
	/* 0.9em left, 0px right */
	/* @noflip */
	padding: 2px 0 2px 0.9em;
}

/* The right image cell */
.imbox td.mbox-imageright {
	/* 0px left, 0.9em right */
	/* @noflip */
	padding: 2px 0.9em 2px 0;
}

table.imbox-notice {
	/* Blue */
	border-color: #36c;
}

table.imbox-speedy {
	/* Pink */
	background-color: #fee7e6;
	/* temp fix for dark mode */
	color: #222;
}

table.imbox-delete,
table.imbox-speedy {
	/* Red */
	border-left-color: var(--border-color-destructive, #bf3c2c);
	border-bottom-color: var(--border-color-destructive, #bf3c2c);
	border-right-color: var(--border-color-destructive, #bf3c2c);
	border-top-color: var(--border-color-destructive, #bf3c2c);
}

table.imbox-content {
	/* Orange */
	border-color: #f28500;
}

table.imbox-style {
	/* Yellow */
	border-color: #fc3;
}

table.imbox-move {
	/* Purple */
	border-color: #9932cc;
}

table.imbox-protection {
	/* Gray-gold */
	border-left-color: var(--border-color-base, #a2a9b1);
	border-bottom-color: var(--border-color-base, #a2a9b1);
	border-right-color: var(--border-color-base, #a2a9b1);
	border-top-color: var(--border-color-base, #a2a9b1);
}

table.imbox-license {
	/* Dark gray */
	border-left-color: var(--border-color-notice, #72777d);
	border-bottom-color: var(--border-color-notice, #72777d);
	border-right-color: var(--border-color-notice, #72777d);
	border-top-color: var(--border-color-notice, #72777d);
	/* Light gray */
	background-color: var(--background-color-neutral-subtle, #f8f9fa);
}

table.imbox-featured {
	/* Brown-gold */
	border-color: #cba135;
}
Description	What you type	What you get
Italic	''Italic text''	Italic text
Bold	'''Bold text'''	Bold text
Bold & italic	'''''Bold & italic text'''''	*Bold & italic text*