As far as i know the status of virginity won't demand the wedding dress and it's coloring.
However, wedding dresses coloring and style goes dependable according to the tradition of the family, religious beliefs ect . . . So maybe what you asking is about some particular religious beliefs ? (which unfortunately i'm not aware of)
The white wedding dress is an old fashion- tradition style that turned the most common style and color across the world, most likely people choose and accept the white color as their wedding dress to represent the light, happiness and purity of the soul.
