I like the cut of the orange dress, but I think it would look better in cobalt blue or even pink. I'm not a fan of the closed neckline of the second dress, it looks more appropriate for an office than a wedding.
I think that for a wedding day the blue one or the orange one look perfect.. yuo should choose something like this, the other two are very pretty but not so good for a wedding.. they are smart but I would wear for a dinner with friends or a drink!
I would definitely go for a light colour, like pinks and blues. I prefer to wear a dress with straps with a fur wrap over the top. I also love wearing a fitted jumpsuit embellished with your favourite jewellery. LOVE this red dress!!