Iris - there are many shades of white and I think a braoder frame can pull of an off white or even an almond color.
I would give emphasis on the material, kaam and the cut of the lehanga. The cut of the lengha can have very slimming effect
I agree completely. I am broad-shouldered and do not have a petit build. One of my wedding dresses was a champagne color, and it was the material, cut, and fit that made it work perfectly for me. Western designers also use corsets, which, though not comfy, make a bride's figure look FABULOUS. You might want to tell your friend to consider looking into figure flattering lingerie (corset, bodysuit, etc) that will also help her look good in whatever she wears. Good underclothes make a huge difference in total look.