São Paulo Metro - Wikipedia
The metro system consists of six color-coded lines: Line 1 (Blue), Line 2 (Green), Line 3 (Red), Line 4 (Yellow), Line 5 (Lilac) and Line 15 (Silver), operating from Sunday to Saturday, from 4:40 AM to midnight (1:00 AM on Saturdays). Line 15 (Silver), is a high-capacity monorail. The six lines achieved an average weekday ridership of 5.3 million in 2019.