Changing the colour of one face of a sphere

I want to generate a grey sphere but I want to change the color of only one face. The following code generates a sphere with all of its faces shaded grey.

rm = 1000*10^3;
[x y z] = sphere(100);   
surf(rm*x,rm*y,rm*z, 'FaceColor', [0.5 0.5 0.5]);

Suppose that I want a specific face to be shaded another color that is located at some specific coordinate on the sphere, how could I do so?

Thanks in advance

Answer 1

[Walter Roberson]

See https://www.mathworks.com/help/matlab/ref/matlab.graphics.primitive.surface-properties.html for information about FaceColor and CData

I suggest you see also warp()