Black, or dark brown. I think basically dark colors. Or like a yellowy gold, something like that. Maybe a light brown to, like a tan color would look nice.
Hope I helped
Black
Copper takes on a brownish color, I've used copper dust in chem that was greenish-blue, that's a pretty popular color. when copper is burnt it produces a green flame, I've also used copper that was gray and greenish-blue in non manufactured copper things I'd look for a bluish green color.
They are usually reddish brown in color.
Copper phosphate has the chemical symbol Cu3(PO4)2 and is a salt of copper that is created when phosphoric acid is added. The color of this substance can range from blue to green.
Copper (II) sulphate is a salt that is blue.
Turquoise
THE Liberty's face was copper color (color of a penny)
Colloidal copper has a slight blue color.
hamzanune koi blade,or a color custom weapon to match it.
Copper changes color to green either because of the weather or a physical change
copper copper
The color fades as there is a discharge of copper two ions to form copper atoms
The metallic PMS color for copper is 876 C. Ignacio Martinez
Copper takes on a brownish color, I've used copper dust in chem that was greenish-blue, that's a pretty popular color. when copper is burnt it produces a green flame, I've also used copper that was gray and greenish-blue in non manufactured copper things I'd look for a bluish green color.
light orange
copper
brown to copper-red color
Red