I’m planning to have my wedding soon and wanted to have part of my clothing as black with golden embellishments.

1) Is that okay? Will it be makrooh wearing that on my wedding day?

2) Also is complete black outfits, but with white print on it, are they makrooh?

1) Yes you can.
Compete black is makrooh not part of it

2) If it is consider as a black dress then it is makrooh.