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Tonight is your night to be a "devil with a blue dress on," but you want your jewelry to be perfect, too. Well, the jewelry you wear depends a lot on where you're going as well as the particular hue and style of your dress. If you're attending a friend's wedding, you'll want to choose different jewelry than if you're out for a night on the town.
Silver and Gold
Whatever shade of blue you're wearing, you can sport either silver- or gold-toned jewelry with it. Just make sure it's one or the other, and not both. If you're wearing silver earrings, make sure your necklace, bracelets, and rings are silver, too. Mixing the two is fine for casual settings, but when you want to dress to impress, nothing says "classy" like matching metals.
Rainbow of Choices
Virtually any gemstone can be worn with blue, including green, as Princess Diana proved when she wore a diamond and emerald choker as a headband with her aquamarine evening gown in Australia in 1985. Rubies contrast beautifully with blue, and yellow gemstones provide the perfect flash of color to brighten things up. Here again, you'll want to wear the same stones throughout, or you'll lose the effect. If you choose an amethyst necklace, your earrings, rings, and bracelets should match, or at least be a solid metal in the same family as the metal used in the necklace.
When you're wearing a darker-hued dress, such as navy, stick with lighter-colored jewelry; don't wear your black onyx studs and choker with it. You don't want your jewelry to blend in with your dress and disappear completely. Instead, opt for diamonds, pink sapphires or opals. Also, don't wear creamy pearls with an ice-blue gown. Choose deep blue sapphires, lapis lazuli or garnets.
The fancier your dress is, the simpler your jewelry should be. If you're wearing a simple A-line dress, you can wear larger, fancier jewelry pieces, but if your dress is frothy with lace, heavily ruffled or billowing with ruching, you've already got enough going on there. Pick a thin chain necklace and simple earrings and leave the bracelets at home.