Hello Botman,
While I believe the easiest way to include color with an object loaded from a wrl file is to export the model with the color information included, I can understand your point here. From what I see, there is not way to set the color of an object loaded from a .wrl file the way you would set the color of an object created programatically in LabVIEW. However, you could apply a texture to the object, where the texture is just a solid color.
I have attached a zip file below (WRL.zip) that shows an example of this idea. It has a simple object loaded from a .wrl file and then applies a 'blue' texture loaded from a bitmap using the VIs found on the graphics palette. I created the bitmap in MSPaint, but you could do it programmatically as well using the other graphics VIs.
It sounds like Insight might still be the way to go if you're not satisfied with these results. I will look into it more and see if there is anything else I can come up with.
Hope this helps!