Aqua is a refreshing color which symbolizes youth and confidence, plus it sprouts up every outfit, you can  pair with spring colors mostly but some dark colors can work well with it too. 

Pearl Torsade Necklace w Earrings w Aqua Blue Glass Vintage Jewelry

fine aquacollection necklace Timeless and Seasonless: Aqua Clara Necklace

Rachel Leigh Singita Stone Drop Earrings, Aqua

tenthings sweet pea aqua and citrine gold earrings from Tenthings Jewelry