The rainbow colours were projected onto the walls of Lynn town hall last night to mark LGBT History Month.
The projection was displayed as borough councillors met inside and their leaders said they were keen to do more to promote inclusion.
West Norfolk Council leader Brian Long said: “It’s important to demonstrate we are inclusive. Whether its LGBT issues, race issues, we have to show we’re open and listening.
“We need to have a programme that evolves from this evening so it doesnt become just a gesture.”