After the ceremony lehenga, the reception outfit is the second hardest choice. It needs to land tonally different from the ceremony piece (otherwise photos blur together), survive a full evening of mingling, dancing, and the inevitable last-dance choreography, and let the bride sit through a long dinner without compression-bandage discomfort.
Most UK brides land on one of three shapes here: a fishtail lehenga (slimmer, more "evening"), a contemporary gown (cleaner lines, easier sit), or a heavier sari (when the ceremony was a lehenga, or vice versa). Pastels are over-represented online but jewel tones — deep emerald, sapphire, midnight blue — photograph harder under hall lighting and consistently age better in albums.