Yea, I’d not be happy with that either. I know it’s the wheelbuilder that should be the first port of call, and even for custom made products you still have consumer rights if they’re not as described (i..e Bronze). But I’d be calling Hope as it’s clearly their fault. No amount of small print about colors may look different depending on monitor settings, vary between batches or whatever can account for them being that far off. They’ve clearly either adjusted the color in the product photos (which is downright deceitful), or can’t reproduce it consistently enough in production (which is always a small issue, but if parts came out the tank a different color they should have just sold them as 2nds or made up a new name for a limited edition) . I’d be asking for new hub shells in a different color if they can’t supply “bronze”.
and Hope wouldn’t cover it either.
Have you asked them? Their CS is pretty good.
If they have said no, I’d take that as a green light to start posting “real world” photos in the comments under all their social media pics, website reviews, etc.