… yellow taxi, yellow pages, yellow traffic sign, yellow phone box, yellow dumper truck, yellow post box, yellow traffic cone, yellow reflective workgear, double yellow lines, yellow subway train, yellow bus, yellow box road marking, yellow skip, yellow number plate, yellow reflector, yellow crane, yellow post-it…

All around the world, yellow is used as a sign for useful things, shared objects, and public goods. Yellow is the colour of consensus, utility, and universal access. Much more potent than the passive neutrality of white, yellow denotes what could be called an “active neutrality”, a common ground created through usefulness.

This ‘universal yellow’ is a strong primary colour, eye-catching, optimistic, inspirational, enlivening, welcoming, communicative, radiant, cheerful, hopeful…