Contrast helps.

From Guide Dogs NSW/ACT:

Contrast – For people who have impaired vision, contrast clues are useful for independent travel and for detecting potential hazards. Contrast exists in different forms with the main types relating to colour, texture and luminance.

For example –

What Grey on Grey looks like:

What Yellow on Grey looks like:

The light rail project has benefitted by slowing traffic and pedestrianising CBD areas around George St.

Unfortunately, discussions in disability groups have highlighted concerns.

Back in December 2019, Disability group voices concerns over new city light rail was raised and published by the Sydney Morning Herald outlined issues with tactile ground indicator tiles around platform edges.

Hopefully these incidents are received by Transport for NSW to be addressed as soon as possible.