The Tate Gallery By Tube; by David Booth of the agency Fine White Line, 1986. ‘The Tate Gallery By Tube’ poster was commissioned for Art on the Underground, a poster-commissioning initiative launched in 1986. | Forgotten London Underground posters - Telegraph
This is cool, the escalator has been turned to look like an iPhone screen with a whole range of apps. This is advertising apples endless apps. It would be hard to miss this whilst you are travelling up the escalator.
How do best brand design agencies use the blue colour
By using the tomato as the Heinz "bottle" you know that their ketchup is fresh, and straight from the source(tomato). Also it ties into the text because they are differentiating themselves on having the freshest, most natural ketchup made out of tomatoes, which happen to be the bottle.