Why are MTR stations different colors?

By The Loop HK Staff  |  November 7, 2017
Admiralty_Station_2014_04_part1
Photo: Qwer132477/Wiki Commons

Why are MTR stations different colors?

By The Loop HK Staff  |  November 7, 2017
Admiralty_Station_2014_04_part1
Photo: Qwer132477/Wiki Commons