Question: Color of the plot of convex hull of points

I'm trying to use the convexhull function to plot convex hull of points. Explanation of the functions is here

http://www.maplesoft.com/support/help/Maple/view.aspx?path=simplex/convexhull

The problem is that the convex hull of the plot is always shown in yellow background. Is there a way to change the color?

 

Thanks.

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