Hair color crisis

The darker the better. you have light features that may go better with the darker hair. one thing that makes the comparison not the best is that your picture with dark hair is not in the same lighting. Still, the darker hair seems better

All of the colors are beautiful. I would say to stick with your current color. You don't want to make such a drastic change right before the wedding where you look back on photos and feel like you're looking at a "stranger".

If your wedding is next month I would suggest only subtle changes at this point. I would put in some ashy lowlights, like in the second photo. That would look amazing!

The blond with lowlights is stunning, though I would place them throughout as opposed to doing bayalage. Like the top half of the second photo.