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A colour standing for a line.
Also known as: Line colour system
The transit convention identifying each line of a network by a fixed colour used consistently across all signage.
Identifies a transit line by a colour used consistently across maps, signage and vehicles.
Contexts: Public information, Maps
Fails for the substantial minority of passengers with colour vision deficiency unless the colour is paired with a number, letter or pattern, which is why modern systems never rely on hue alone.
Contexts: Public information, Maps
A solid colour applied to a line's route on the map, to its platform signs, to its train livery and to the ticket, held constant throughout the network.