[css-color-4][editprial] add a couple of WPT for transparent

Author: svgeesus

css-color-4/Overview.bs

@@ -2148,6 +2148,11 @@ The ''transparent'' keyword</h3>
 	The keyword <dfn value for="<color>">transparent</dfn> specifies a <a>transparent black</a>.
 	It is a type of <<named-color>>.
 
+<wpt>
+	parsing/color-computed.html
+	parsing/color-valid.html
+</wpt>
+
 
 <h3 id='currentcolor-color'>
 The ''<color>/currentcolor'' keyword</h3>
@@ -2428,7 +2433,7 @@ HSL Colors: ''hsl()'' and ''hsla()'' functions</h2>
 Converting HSL colors to sRGB colors</h3>
 
 	Converting an HSL color to sRGB is straightforward mathematically.
-	Here's a simple implementation of the conversion algorithm in JavaScript.
+	Here's a sample implementation of the conversion algorithm in JavaScript.
 	It returns an array of three numbers
 	representing the red, green, and blue channels of the colors,
 	normalized to the range [0, 1].