Highlight your décolletage with a plunging neckline and colorful necklaces. Antique-white silk-satin halter dress, about $2,160 (includes brooch, not shown), by Amy Kuschel Bride, amykuschel.com. Turquoise necklace, $115, by Accentuality by Marissa Giannini, accentuality.com. Citrine necklace, $400, by KEP Designs, kepdesigns.com. Sterling silver-and-amber bracelet, $150, by Tip-To-Toe. Horn bangles, $70 for three, by Chan Luu at Fragments, fragments.com.