BUR #4283 has been approved by @evazion.
create implication blue_tongue -> colored_tongue
create implication purple_tongue -> colored_tongue
create implication green_tongue -> colored_tongue
create implication orange_tongue -> colored_tongue
create implication yellow_tongue -> colored_tongue
We already have colored tongue. IMO it's better to repurpose it to be like colored skin etc since we already have several specific color tags that are much bigger than the generic tag itself.
(I had to nuke colored tongue, which had a few dozen posts, into the specific colored tags because otherwise I'd get an error when requesting these implications, so now it's empty. Created issue #4643 for this bug.)