color of shape3dD

[guxss3]

Hi,
I ran the demo successfully, but the colors randomly generated of floating and target are often close during visualization, so is there a way to specify the color for single object.
Thanks.

The relevant code is as follows:

%% Visualize
s = shape3D;
s.Vertices = correspondingFeatures(:,1:3);
st = shape3D;
st.Vertices = targetFeatures(:,1:3);
v = viewer(s);
viewer(st,v);