The team who designed the bridge included Australian and Singaporean architects. The main design idea is based on the double helix model of DNA. This can be seen best at night, when the bridge is lit up by a series of lights that show the double helix structure. Pairs of coloured letters ("c" and "g", as well as "a" and "t") on the bridge which are lit up in red and green. They represent cytosine, guanine, adenine and thymine, the four bases of DNA.