The Isopterans are an insectoid species with a hive-mind consciousness. Like some Earth insects, the Isopterans are eusocial, featuring separate worker, soldier, and drone castes that serve each hive's single queen. There were five distinct hive-mind identities in the Isopteran invasion of Earth in 2009, which were arbitrarily assigned colors by the humans: red, green, blue, yellow, and black.
Read more about the Isopterans in the GagMen Podcast adventure, Worming My Blues Away.