Well, the picture doesn't appear for some reason. But, the box says "ivory cake." If that's the case, you can use real brown vanilla instead of clear vanilla in your BC. That will make it off-white. If you want it a little darker, there is a Wilton color called Ivory. HTH!
I'd say Ivory.
I see a hint of gold shimmer also.
I think it looks like white covered with a light coat of the gold spray.
It does look like it's got a little sparkle to it. Using brown vanilla as suggested will probably give you the right color, and then you can dust it lightly with gold luster dust or airbrush lightly with gold sheen if you have an airbrush.
It looks like ivory with a light gold shimmer to it.
I think the bow and scrolls look ivory and the actual cake looks like a very pale coffee color (like milky coffee) with the gold shimmer.