It isn't. Tower Bridge is blue.
London Bridge doesn't have any support cables.
yellow lo
Usually London buses are red. Although I think you know the answer because you stated it in the question.
Blue, Yellow, Black, Green, Red
Because the original bridge was the ONLY bridge in London at that time.
Tower Bridge and London Bridge.
Tower Bridge is east of London Bridge.
White and Light-blue, like the colours of the Argentine flag.
The Piccadilly line on the London Underground is identified by a dark blue color.
London Bridge. The Olympic rings are on Tower Bridge - not London Bridge.
The London bridge
London Bridge.