Well, hold on. Gold is a specific color, specularity and emissiveness. I wouldn’t expect to achieve it in a 2D drawing program, and I’m not sure what fraction of monitors can achieve it at all, but it’s simple enough in Unreal Engine.
The color of physical metallic gold is outside of sRGB color space. Maybe you could get close enough to fool people with some of the best modern HDR's (I don't know), but for most of the history of modern computing it didn't matter how good you were at digital animation -- no display could display the color "gold" even if you could mathematically compute the right color.
The real problem is that gold is a mirror. It's shiny and changes appearance based on viewing angle and environment. A computer can only simulate that for the scene within the computer. It can't make the image itself more or less shiny than the physical monitor.
Without the shininess, gold just looks like a dirty yellow.
I'm sure that there are some colors in the human-visible range that aren't covered by sRGB but idk if gold is one of them
Another one is the "speckles" you see when illuminating a surface with a laser.