What does it mean if you see a pedestrian with a dog that has a yellow or burgundy coat?

Assistance dogs

There are different types of assistance dogs. Hearing dogs for deaf people normally wear burgundy coats and hear sounds and danger signals such as the fire alarm, telephone and doorbell that deaf people can’t.

Assistance dogs: how to spot them – BBC

How hearing dogs help deaf people – hearingdogs.org.uk

Hearing dogs: ‘She is my ears’ – guardian.com