Central Line
The Circle line is yellow.
There are 15 Underground station at the Bakerloo line.
On the London Underground map, the Circle Line is coloured yellow.
The Victoria Line.
jubilee line
The Circle Line Unfortunately this answer is wrong! According to Transport for London the only tube line to connect all London Underground lines is the Jubilee Line.
Green is the District Line
Hammersmith and City.
Jubilee Line.
It's on the BAKERLOO Line.
Hammersmith & City line