ion flame color testing

These are the results i obtained from the flame tests.
The CoCl burned orange.
The LiCl burned  cherry red.
The CaCl burned an orangish red.
The CuCl burned green.
The NaCl burned bright orange.
The KCl burned a light purple.
The SrCl burned red.
The FeCl burned orange.
The BaCl burned leaf green.

the unknown chemical was a blue solution, and it burned green and purple, so that would mean that there was potassium and copper in it.
Also copper sulfate is a blue color.