Your logo is not printed in full color. Standard Branvas packaging uses gold foil stamping, a single-color process, so we convert your uploaded logo into a one-color version and stamp it in gold. The mockup is showing you that conversion, not a color error.
If your logo relies on multiple colors, a gradient, or light detail sitting on a dark background, those elements can flatten or disappear in the conversion. Upload a simplified single-color version and we will use that instead.