so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions Light Blue Sequin Mermaid Long Sleeve Prom Dress with Sweetheart Neckline and Slit 22180 Custom Colors 20W SHEIN Joyfunear Split Thigh Sequin Lace Up Formal Prom Dress Blue NEW NIP Med eBay Dylan & Davids Long Sleeve Sequin Formal Beaded Dress Navy 22 The actual dress was black and blue. The confusion came from how lighting and color perception tricked people's brains, making some see it as white and gold. It became a viral example Long Navy Blue Glitter Dress Prom Gown Blue Sequin Dress Spaghetti Strap Royal Blue Dress Wedtrend Women Sparkly Black Prom Dress