Proper Scarterran Wedding Attire doesn't resemble modern Earth wedding attire

Scarterra has many mortal races and each race has many nations and tribes. They all have different wedding traditions, but a few wedding traditions are near universal in civilized lands. Nomadic barbarians are another story.  

"Wedding dresses" are not common in Scarterra

  Waste is Taboo on Scarterra. Every possible material made into a garment comes from an animal or plant, generally in a labor intensive fashion. Every garment has to be sewn and tailored by hand. Every colored garment must be dyed by hand.   That means that it is extremely wasteful and indulgent to make a dress or suit intended to be worn at only a single event. Even if it's a wedding. Even if the bride and groom are from very wealthy families.     Whether wealthy or poor, brides and grooms will wear the best clothes they can afford to their own weddings. But they won't wear wedding clothes, they will wear formal clothes. They are probably going to wear their same wedding outfits when they are guests at other people's weddings. They are also going to wear these outfits at baptisms, formal court appearances, and formal religious holidays to the Nine.   The point is, Scarterrans don't make outfits that only outfits that only are worn once.  

Brides don't normally wear white at their weddings

  The idea that white dress represents a virgin bride is a fairly modern concept on Earth. It was not a medieval concept, and it is not a Scarterra.   White clothes does not represent virginity or purity or anything like that. White clothes in Scarterra represent wealth. Wearing white clothes is a status flex, whether they are worn at a wedding or on any other occasion.   White clothes require fairly rare and expensive materials. More importantly, white clothes are hard to keep clean, so white garments don't last as long as non-white garments. Ergo, white clothes are effectively more expensively because most clothing is made to last.   All clothing in Scarterra has to be washed by hands. And the tools and materials used to aid in washing clothes are not on par with modern soaps and detergents, certainly not on par with modern washing machines and dry cleaning.   Magic can help with cleaning, especially Purification theurgy. You need to be rich to afford magical cleaning, or you need to be part of a holy order with lots of Purificationists in it. Even then, a Purificationist can only use his/her magic so many times in one day and mana to expended to clean clothes is mana that is not expended to cure diseases or create clean drinking water.   If someone is wearing white at a wedding, more often than not, the person wearing white is the priest or priestess officiating the ceremony.   In the rare occasions where the bride is wearing white, it's not representing purity. It means the bride's family is flexing their wealth.  

Peacocking is common

  In modern weddings, it generally considered poor taste for a wedding guest to outshine the bride and groom. This is not normally the case at a Scarterran wedding.   It is customary for wedding guests to wear the fanciest clothes they have available to them. This means that if a relatively high status person is attending the wedding of a relatively lower status person, than that guest will probably have fancier clothes than the bride and groom.     The bride and groom seldom complain, because high status guests normally bring a nice present. When attending the wedding of a lower status person (or an honored peer), it is considered a faux passe not to bring a nice present.     For most peasant weddings, specific colors are not that important, but a peasant's best clothes are usually brightly colored clothes. This means a peasant wedding reception can look like a drunken rainbow.   If a wedding represents a political alliance bringing two houses together, both the bride and groom are going to wear outfits that showcase their family colors and their family crest in a very loud and obvious fashion. The same will apply to the wedding guests who are also wearing their political affiliation on their sleeves, literally.   Among dwarves, even peasant weddings have a vaguely political air to them. Even relatively poor dwarves take their clan affiliation very seriously, so any dwarf wedding is a formal alliance between two clans and the guests are likely to be wearing carefully coordinated clan colors.   All four major dwarf subcultures follow this norm in some fashion. This is unique to dwarves, among humans, elves, tengku, gnomes, and pretty much everyone else, only highborn couples and guests worry about color coordinating in this fashion.