Canary yellow and Stool pigeon

Canary yellow noun - A moderate yellow with a greenish tinge.

Stool pigeon and canary yellow are semantically related. In some cases you can use "Stool pigeon" instead a noun phrase "Canary yellow".

Stool pigeon noun - A person who provides information about another's wrongdoing.

Canary yellow and stool pigeon are semantically related. Sometimes you can replace phrase "Canary yellow" with "Stool pigeon", this phrases are similar.