Or alternatively, those colors are good for a beetle with a termite on its back ...

joebob42 on Sept 7, 2023 | parent | context | favorite | on: Beetle grows ‘termite’ on back to steal food

Or alternatively, those colors are good for a beetle with a termite on its back for the same reason they're good for a termite. They help whatever the termite looks like blend in to the area where termites usually are.