[css-color-4] Added hue normalization examples, fix w3c#10432

Author: svgeesus

css-color-4/Overview.bs

@@ -1062,6 +1062,19 @@ and is the [=canonical unit=].
 This number is normalized
 to the range [0,360).
 
+<div class="example" id="example-hue-normalization">
+	For example, in <span class="swatch" style="--color: #000"></span> ''hsl(-540 0 0)'' 
+	or <span class="swatch" style="--color: #000"></span> ''hsl(540 0 0)'', 
+	the <<hue>> component is normalized to 180 degrees.
+	
+	In <span class="swatch" style="--color: #000"></span> ''hsl(360 0 0)''
+	the <<hue>> component is normalized to 0 degrees.
+
+	In <span class="swatch" style="--color: #000"></span> ''hsl(calc(-infinity) 0 0)'' 
+	or <span class="swatch" style="--color: #000"></span> ''hsl(calc(infinity) 0 0)'', 
+	the <<hue>> component is again normalized to 0 degrees.
+</div>
+
 Note: The angles and spacing
 corresponding to particular hues
 depend on the color space.