Hi Haizal Bin Jaffar! To update your car’s colour on OneMotoring website, follow these steps:

1. Log in using your SingPass.

2. Go to Ownership → Vehicle Scheme/Specifications.

3. Select Amend My Vehicle Specifications, then update your car’s colour.

4. Review and acknowledge the changes.

Once the application is successfully submitted, the changes typically take around 3-5 working days to be reflected on the vehicle log card.

apparently you have to click on the search bar and then search for vehicle COLOUR change in order to be able to change the colour of your car.