What colors are copper oxide and copper respectively?

What colors are copper oxide and copper respectively?
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The color of copper oxide is black, and the color of copper is purple.Copper(II) oxide (chemical formula CuO) is a black oxide of copper, which is slightlyBoth sexes, slightly hygroscopic. The relative molecular weight is 79.545, the density is 6.3 ~ 6.9  g/cm3, and the melting point is 1026℃. Insoluble in water and ethanol, soluble in acid and chlorineAmmonium and potassium cyanide solution, slowly dissolved in ammonia solution, can react with strong  alkali. Copper oxide is mainly used to make rayon, ceramics, glaze and enamel, batteries and stoneOil desulfurizer and insecticide are also used for hydrogen production, catalyst and green glass.Copper is a kind of transition element, chemical symbol Cu, English copper, atomic number29。 Pure copper is a soft metal. When the surface is just c
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