Green, I think but i am not 100% sure
Copper nitrate does not have a distinctive color when burned. The flame may likely be blue or green due to the presence of copper ions.
Copper has a specific red colour, is not hard and is very malleable.
blue
Yes, at a high enough temperature Copper will burn and combine with Oxygen to form Copper oxide.
The colour of any sample containing copper ions burns with a bluish green flame in the flame test.
The metal that will destroy the blue colour of Copper ions is any metal above copper in the reactivity series, such as calcium.
Copper nitrate is definitely a blue colour, even though copper (II) ions, Cu2+, generally produce blue-green solids and solutions.
The colour of Copper sulphate is blue because Copper ions absorb light in all frequencies except blue which is reflected instead.
You get and orange - yellow colour.
Copper gives off a bluish colour
When copper gets burned, its own identity vanishes and it changes into a black coloured powdery substance. This substance is copper oxide. The reaction is as follows:- 2Cu(s) + O2(g) ------> 2CuO(s)
No colour