Blue-purple ruffles create several clearly distinguishable colour zones here. Pale blue sits beside darker blue and purple rows. Above them is a closer upper section with a patterned area and large decorative shapes. The arms are raised overhead, leaving the top edge especially visible. For your own multicoloured bridal idea, the picture is useful primarily as a question about the distribution of shades.
Decide which colour should occupy the largest area in the actual garment first. Then choose a small accessory that repeats an existing shade. A blue bag could pick up one skirt colour, while a quiet dark shoe leaves more attention on the ruffle rows. Compare these solutions in turn rather than immediately adding another strong colour family.
Also check the skirt in an ordinary standing position and while walking. Its width and many outer edges contribute jointly to the colour effect. If you like only the combination of shades, look for a narrower or less tiered alternative as well. You need not adopt every decorative idea shown here to use blue and purple in your own outfit.