Use the standard colour logo on white backgrounds.

https://www.cardiff.gov.uk/Style%20Library/images/CardiffCouncilColour.svg

Use the white out logo on dark and bold flat colours.

https://www.cardiff.gov.uk/Style%20Library/images/CardiffCouncil.svg

Incorrect usage

As with any identity guidelines areas can be open to interpretation. Common sense is invaluable, and if you feel what you have done doesn’t make sense or looks strange then it is probably wrong.
Below we have highlighted things that should never be done to our identity.