Centerpieces

They are pretty, but I agree if every thing else is dark and the light is low in the venue, they will likely just look dark and blend in with dark linens, etc. In low lighting, it may not even be clear that the flowers are both navy and purple -- just dark. It depends on what your vision is; generally, especially in low light, I think some contrast is good as it adds interest, layering, and depth. I do agree with Judith though that white may be too much contrast and in photos all you'll see is white. I'd consider either choosing lighter linens or lighter flowers. Just because your colors are navy and purple doesn't mean that everything has to be those exact colors and shades -- contrast and some subtlety is a good thing! Perhaps consider soft champagne colored tablecloths (which would look nice with the brass/gold vases) or lighter shades of purples and blues -- with some greenery -- for the florals.

I think they look wonderful!! And not too dark at all! 💜

I'd try doing a mock-up of everything you are considering -- dark tablecloth, flowers, candles, etc. -- in your home. Try to replicate the low light levels you're anticipating. In addition to eyeballing everything, try taking photos so you can really get a good idea of how it will all look, both in person and in your photos. Decor choices are really a personal choice. What's important is that you love it and how it looks. The only way to judge that is to do what you can to try and "see" how your ideas will look. Good luck!

I think they look fantastic! If anything I would consider adding gold into them somehow? You could play around with adding gold floral balls or gems maybe.