[css-color] Typo fix.

Author: SimonSapin

css-color/Overview.src.html

@@ -154,7 +154,7 @@ <h3 id='the-rgba-function'>
 	but with a different range:
 	''0'' again represents the minimum value for the color channel,
 	but ''255'' represents the maximum.
-	These values come from the fact that emany graphics engines store the color channels internally as a single byte,
+	These values come from the fact that many graphics engines store the color channels internally as a single byte,
 	which can hold integers between 0 and 255.
 	However, the CSS syntax allows full <<number>>s,
 	not just <<integer>>s,