What colours are the different lines on the London Underground? I love standards and consistency, me. #link 2005.12.28 @ 20:42 GMT // Aux // You were reading What colours are the different lines on the London Underground?, a link posted with comment by MacDara Conroy. It’s filed under Aux and was published in December 2005. If you liked what you read here, you can follow this site via its web feed, and find many more entries in the archive. You can also buy me a Ko-fi.