Subte de Buenos Aires

1994-2013
First unified logo for the network introduced by Metrovías. Each line had a different coloured version of this logo (A-Light Blue, B-Red, C-Blue, D-Green, E-Purple, H-Yellow)

2013-present
Despite the fact that the individual colours were gotten rid of at the entrances, they still represent each line, while yellow is the official colour for the entire line.

2015-present
This logo is only used in certain websites and for the Android and iOS apps.