I wasn’t sure. But we’ve all seen footage of US & Allied troops marking their vehicles during combat operations to make them extra visible to their own aircraft and forward observers. But “invasion stripes” hearkens back to the crude paint roller jobs on allied aircraft for the Normandy Invasion.
That is EXACTLY what they are. In the US we probably use pastels...but my point was they used the term in the headline, but edited out of the story.