How does gold color affect to material safety?

Vixen Creation makes their toys our of 100% silicone. The gold used in this toy is gold dye in the silicone prior to insertion into the mold not a gold coating put on the outside of the toy. The black and gold versions of this toy have identical material safety. Due to the manufacturing process, the gold coloring is not even throughout the toy so it may not look exactly like the one in the photograph.