Copper acetate synthesis without hydrogen peroxide
I placed 1tbs salt, 1L vinegar, and 200g solid copper in a jar. After 3 months in a dark place the solution was extremely dark blue - so blue I couldn't see through it. This is what happened (bottom answer).
How may copper acetate ligands be manipulated to change colors?

Heat may be able to substitute for time and quicken the formation of copper acetate...I really haven't tried. Peroxide is dirt cheap. I would have used it if I had known.