Mix the primary colours, red, yellow and blue together in equal parts to create brown.
Mix this brown with white. Then add yellow.
You will create a yellow that’s the closest you’ll get to gold without a metallic sheen.
When trying to depict gold in a painting, avoid using ready-mixed paint with a metallic sheen. It will look odd when used next to the other non-metallic colours.
Experiment with the colours you have to try and create a colour similar to gold.