I guess the best way to tell if a wedding dress works is if it looks good on you, as opposed to a model xD If I were you, I'd try dresses on, and see how they work with your body, your shape, your colours (like skin and hair). You might find that a dress that didn't seem so nice before works better with you than a dress you had liked the look of beforehand.
Personally, I don't like this design, but that's because I have my own preferences for an "ideal" dress - and every girl's opinions differ. If you like it, and you want those colours, that's all that matters c: