Minor documentation cleanup

Author: pnstickne

src/core/Stage.js

@@ -286,7 +286,11 @@ Phaser.Stage.prototype.visibilityChange = function (event) {
 };
 
 /**
-* Sets the background color for the Stage. The color can be given as a hex value (#RRGGBB) or a numeric value (0xRRGGBB)
+* Sets the background color for the Stage.
+*
+* The color can be given as a hex string (`'#RRGGBB'`), a CSS color string (`'rgb(r,g,b)'`), or a numeric value (`0xRRGGBB`).
+*
+* An alpha channel is _not_ supported and will be ignored.
 *
 * @name Phaser.Stage#setBackgroundColor
 * @param {number|string} backgroundColor - The color of the background.

src/utils/Color.js

@@ -622,15 +622,17 @@ Phaser.Color = {
     },
 
     /**
-    * Converts a string - either in "hex" or a "CSS 'web' string" into a Phaser Color object.    
+    * Converts a value - a "hex" string, a "CSS 'web' string", or a number - into red, green, blue, and alpha components.
+    *
+    * The value can be a string (see `hexToColor` and `webToColor` for the supported formats) or a packed integer (see `getRGB`).
     *
     * An alpha channel is _not_ supported when specifying a hex string.
     *
     * @method Phaser.Color.valueToColor
     * @static
-    * @param {string|number} value - Can either be a string (see `hexToColor` and `webToColor` for the supported formats) or a number (see `getRGB`).
-    * @param {object} [out] - An object into which 4 properties will be created: r, g, b and a. If not provided a new object will be created.
-    * @return {object} An object with the red, green, blue and alpha values set in the r, g, b and a properties.
+    * @param {string|number} value - The color expressed as a recognized string format or a packed integer.
+    * @param {object} [out] - The object to use for the output. If not provided a new object will be created.
+    * @return {object} The (`out`) object with the red, green, blue, and alpha values set as the r/g/b/a properties.
     */
     valueToColor: function (value, out) {