On opening night, Taylor Swift shared eight photos from rehearsals for the Eras Tour with the caption "In my Eras era" along with a nail polish emoji. And in the final image, there's a picture of her wearing embroidered overalls and holding her hands out, with each nail painted a different color. "This is reminding us that every era has a color," said one fan on TikTok who broke down Swift's manicure. It's a simple enough design — 10 colors for each Swift era. The colors go in order of the era/album, starting with the left pinky, so when you hold your hands up, you can see the album progression from left to right. If you want to do it yourself, make sure you've got the pattern down.

On the left hand, it starts with a bright mint green on the left pinky for "Taylor Swift," followed by a glittery gold for "Fearless," purple for "Speak Now," bright red for "Red," and turquoise on the thumb for "1989." Over to the right hand, black nail polish on the thumb represents "Reputation," bubblegum pink for "Lover" (more on that one later), a pale lavender gray for "Folklore," nude/cream color for "evermore," and then on the right pinky, a sparkly blue for "Midnights."