I need "silver" colored wire to run through chain for hanging lamp to connect to ground where it mounts to ceiling

I bought a "Brushed Nickel" ceiling fixture to hang over my dining table, but it did not come with a long enough chain or wire.

I found the chain & two strand "lamp" wire in "brushed nickel" at Lowes, but they only had copper coloured ground wire, which will look odd where it weaves through the chain to attach to the plate on the ceiling.

Can I use one of the following:

1. picture hanging wire (twisted)
2. galvanized steel wire (appears to be single filament)
3. smaller (finer) guage speaker wire, split to only use the "silver" coloured wire

Or any ideas where I might find something appropriate to use as a ground in "silver" colour?

Thanks very much!