Readme: Make it explicit browser support in README is about version 3.x

Author: mgol

README.md

@@ -4,7 +4,7 @@
 
 ## Browser Support
 
-jQuery Color supports the following browsers:
+jQuery Color 3.x supports the following browsers:
 
 Desktop:
 * Chrome: (Current - 1) and Current
@@ -18,6 +18,8 @@ Mobile:
 * Chrome on Android: (Current - 1) and Current
 * Safari on iOS: (Current - 2), (Current - 1) and Current
 
+Information on browser support of jQuery Color 2.x can be found in the [Browser Support section](https://github.com/jquery/jquery-color/blob/2.x-stable/README.md#browser-support) in its README.
+
 ## Using jQuery Color in Production
 We release jQuery Color by itself, or in a bundle.  The extended names can be included as a jQuery Color plugin, or you can download the version of jQuery Color that includes the names.  Choose your build from the following list: