[css-color-4] show, don't tell

Author: svgeesus

css-color-4/Overview.bs

@@ -1007,7 +1007,9 @@ The ''<color>/currentcolor'' keyword</h3>
 			&lt;/style>
 		</pre>
 
-		In the above example, the emphasis marks would be black over the text "Some" and "emphasized text",
+		<p><img src="images/text-emphasis.png" alt="rendered emphasized text with the word 'really' in red with red emphasis dots"/></p>
+
+		In the above example, the emphasis marks are black over the text "Some" and "emphasized text",
 		but red over the text "really".
 	</div>