[css-color-5] add vs per WG resolution

Author: svgeesus

css-color-5/Overview.bs

@@ -443,13 +443,13 @@ Selecting the most contrasting color: the ''color-contrast()'' function {#colorc
 	to the single color.
 
 	<pre class='prod'>
-		<dfn>color-contrast()</dfn> = color-contrast( <<color>>  <<color>>#  )
+		<dfn>color-contrast()</dfn> = color-contrast( <<color>> vs <<color>>#  )
 	</pre>
 
 	Issue(#4749): <a href="https://github.com/w3c/csswg-drafts/issues/4749">add target contrast ratio to color-contrast?</a>
 
 	<div class="example">
-		<pre class="lang-css">color-contrast(wheat tan, sienna, var(--myAccent), #d2691e)</pre>
+		<pre class="lang-css">color-contrast(wheat vs tan, sienna, var(--myAccent), #d2691e)</pre>
 
 		The calculation is as follows:
 			* <span class="swatch" style="--color: wheat"></span> wheat (#f5deb3), the background, has relative luminance 0.749
@@ -463,7 +463,7 @@ Selecting the most contrasting color: the ''color-contrast()'' function {#colorc
 
 	</div>
 
-	The colors in the list are tested sequentially,
+	The colors in the list (after the keyword vs) are tested sequentially,
 	from left to right;
 	a color is the temporary winner
 	if it has  the highest contrast of all those tested so far,
@@ -477,7 +477,7 @@ Selecting the most contrasting color: the ''color-contrast()'' function {#colorc
 			foo {
 				--bg: hsl(200 50% 80%);
 				--purple-in-hsl: hsl(300 100% 25%);
-				color: color-contrast(var(--bg) hsl(200 83% 23%), purple, var(--purple-in-hsl));
+				color: color-contrast(var(--bg) vs hsl(200 83% 23%), purple, var(--purple-in-hsl));
 			  }
 		</pre>