I want to create a sphere in Raphael which should look like

I am using Paper.ellipse with equal horizontal and vertical radius to draw sphere.
I think I need to tweak fill attribute to achieve effect as shown in image. Also I want sphere in different color with same effect.
Can anybody point out any helpful link about fill property in Raphael as I couldn’t find enough information?
Used
You can use any color like
yellowor color code like#00CC33for hue.Demo.
Demo Source Code.