Base is definitely black and not bronze. 
Update: We have had this almost one year. Lamp randomly turns off or dims. We have tried different bulbs thinking this would resolve the problem. Does not dim- either bright or very low. Anything in between flickers. Very low often goes off. Pretty disappointing now that we aren't able to return or exchange. 
UPDATE: 2.5 years, this light no longer turns on. Wayfair generously offered 10% credit and gave me manufacturer contact info. Manufacturer asked for PO number I don't have then rudely told me via email that I am past warranty. Shameful customer service considering I am only requesting replacement parts for a lamp that has been defective from the start. 
Don't recommend this product or the MFR. There are so many other similar options for same or less cost