The logo consists of a spanner that portrayed the hopes and aspirations of the working class, an octagon shape representing multi-racialism in Singapore, and eight cogs of a wheel, representing:

1. National solidarity and well-being
2. Dignity of labour
3. Brotherhood of workers
4. Industrial peace with justice
5. Modernisation of the Labour Movement
6. Progress of labour
7. Cooperation of labour
8. Co-equal in the tripartite partnership of labour, government and management in the social, economic and political advancement of Singapore.

The colour scheme consists of a red that represents the international brotherhood of workers, while the white stands for purity, honesty and integrity of the Labour Movement.

In 2008, it was replaced when the union underwent a rebranding exercise.