Nice, decorative jewelry. Not like, a small gold chain. Maybe sunflower earrings or something.
You really don't have to go all out. Sometimes simple is more effective. By the way, where did you get the dress? I'm considering wearing sun dresses more often, but I don't know what stores actually sell them.
Because this is such a versatile dress,you can wear it with flip flops, a necklace,and a cute pair of sunglasses to the beach,or dress it up.Personally,id definatley go for some strappy sandals,maybe a sky blue cardigan to throw over,either dangly or hoop earrings,(if my hair were up) and a few chunky bracelets.You can pair virtually any color with it,but id definatley go with light blue and beige.Good luck,and cute dress =)