Hi smsurendar,
Based on my understanding, you want to draw series things such as Rectangle, Ellipse, Arc etc. And each of the shape you want to fill different color. If I have misunderstood you, please feel free to tell me, thanks.
You can draw and fill color each of them individually, and take advantage of the the point to connect them together, so they look like a one shape with different colors.
Hope this idea can help you !
Regards,
Roy Zhou